1903A3 – The ExhaustNotes Blog

This is an update on my latest 1903 Springfield load development work.

I purchased this rifle about three years ago assuming the headspace was correct, but it wasn’t. That’s a risk associated with old military rifles. Rifle parts are often mixed through the years, and when doing so with the bolt and the barreled action, it’s easy to induce an excess headspace condition. That’s what I encountered on my rifle, so I had the Civilian Marksmanship Program (CMP) in Anniston, Alabama install a new 1903 barrel and rechamber the rifle. Live and learn, I guess. Always check the headspace when purchasing a milsurp rifle.

As it was returned to me from the CMP the rifle shot to the right and jacketed bullets shot way too high (at least I thought it shot way too high, but I was wrong…more on that in a bit). I noticed that the front sight was biased to the left (which made the rifle shoot to the right). I drifted the front sight in its base (it’s a dovetail fitting). The front sight takes a retaining screw that secures it to the barrel mount, and on my rifle that screw was missing. It might have shipped that way from the CMP or it might have fallen out.

When the Springfield was returned to me from the CMP, the front sight was biased to the left, as you see here. I didn’t notice it at first.

I wrote to the CMP regarding the missing front sight screw, but I haven’t heard from them and I found a replacement front sight screw on the Sarco website. I haven’t installed it yet (that will come later). I drifted the front sight in its dovetail to the right, and that brought the point of impact closer to the point of aim.

Before I get into the reloading specifics, I should explain a bit about the rear sight. The rear sight on the 1903 Springfield rifle is a complicated device. It’s called the M1905 rear sight, and it is designed and calibrated for standard military ball ammo (back in the day when the Army used .30 06 ball ammo). The sight is a ladder type rear sight and it has four aiming methods. One is the battlesight zero (it’s with the ladder down); the other three are with the ladder up which allows adjusting for various distances. In the big photo at the top of this blog, you see the rear sight with the ladder up. In the photo below, you see the rear sight with the ladder down.

The M1905 rear sight assembly on the 1903 Springfield rifle. The sight ladder is in the down, or battlesight zero position. Wow, there’s a lot going on there.

This first aiming method is through the battlesight zero notch with the ladder down. Battlesight zero means the bullet will coincide with the point of aim at 547 yards. The thought is that if you hold center of mass on a man-sized target at any distance up to 547 yards, you’ll hit the target. At 100 yards the rifle will shoot way high with the ladder down using the battlesight zero, which is what I experienced. I did not understand this was a normal occurrence when using the battlesight zero rear sight notch.

The 1903 Springfield’s rear sight in the raised position. Note that the sides of the rear sight force the crossbar to the left as distance to the target increases. That’s a built-in feature to compensate for bullet drift to the right at longer distances. Clever people, those Army engineers were. This rifle is over 100 years old.

The other three aiming methods all involve shooting with the ladder up (as you see in the above photo). You can adjust for various ranges from 100 yards out to 2800 yards (which is roughly a mile and a half) by loosening the crossbar lock screw and sliding the crossbar up or down to various indicated ranges on the ladder. One sighing method uses the crossbar upper notch. You simply slide the crossbar up or down so that the top of the notch aligns with the estimated distance to the target (in yards) on the ladder’s distance graduations. Another sighting method uses the crossbar lower notch. In this case, you slide the crossbar up or down so that the top of this lower notch aligns with the estimated distance to the target. The last sighting method involves using the crossbar aperture. There’s a horizonal scribe line across the plate containing this aperture, and when using the aperture, you align that scribe line with the estimated distance to the target. The aperture allows zeroing the rifle for ranges as close at 100 yards, which is where I do most of my shooting.

All the above is calibrated for standard military .30 06 ball ammo. If you’re shooting cast bullet ammo, or jacketed ammo with bullet weights or velocities other than standard ball ammo, you have to zero your rifle for your specific load.

There’s one other bit of coolness incorporated into the design of this rear sight. The sight ladder is designed so that as you raise the crossbar, the sighting notches and aperture move to the left. That’s to compensate for the bullet’s natural drift to the right as distances increase.

It’s all very clever, but in my opinion the Army made it too complicated. The rear sight was probably designed by an engineer who never had to carry or use a rifle in the field or train recruits to do so. I think most of the guys I served with in the Army would have a hard time remembering all this (I’m an engineer and I struggled to understand it). Apparently the Army agreed: They simplified the rear sight on the later 1903A3 rifle. The 1903A3 rear sight is much better for an infantry rifle.

That’s enough background on the 1903 Springfield sights. Let’s get to the reloading variables and which loads the Springfield likes. I prepped several, and I also grabbed some of the ammo I had previously loaded for the M1 Garand.

Four bullets used in this testing. From left to right: The Hursman 173-grain cast bullet, the Montana 210-grain cast bullet, the Winchester 150 grain jacketed soft point bullet, and the jacketed Speer 168-grain Match bullet.

The Hursman cast bullet loaded in a .30 06 cartridge.

I first fired at a 5o-yard silhouette target to see where the bullets were hitting (there’s lots of real estate on that target). With the ladder down, the point of impact was to the right and low using the 17.0-grain Trail Boss and 173-grain Hursman bullet load. With the ladder up, it moved left a little and printed higher using the higher rear sight notch. For that 0.793 group up top, I used the bottom edge of the upper left box as the aimpoint. For the other two groups, it was the bottom of the orange bullseye.

An initial target shot with cast bullets and Trail Boss powder. There’s a lot of real estate on this target, so I could see where the rifle was shooting.

I shot groups at 50 yards with several different loads using combinations of the bullets shown above and SR 4759, Trail Boss, 5744, and IMR 4064 propellants, all at 50 yards, and all with neck-sized-only .30 06 brass. Then I returned a week later and fired groups with the 150-grain jacketed Winchester bullets (again at 50 yards).

After shooting the above groups, I had 20 rounds left with the Trail Boss, Hursman bullet, and SR 4759 load. I shot two of them at a clump of dirt at about 80 yards and hit it (I think) both times. Then I put a 100-yard small bore rifle target up at 100 yards and shot at it with the 173-grain cast bullet SR 4759 load (8 rounds were crimped, and 10 rounds were not). To my surprise, all 18 rounds were on the paper and 14 of the 18 were in the black. It’s not that great a 100-yard group, but it shows potential. All this was with the ladder down using the battlesight zero sighting approach, so with cast bullets this rifle (at least with the SR 4759 load) is pretty much in the ballpark.

Cast bullets at 100 yards using the battlesight zero rear sight.

For the jacketed loads, I used the 150-grain Winchester jacketed soft point bullet (I bought a bunch of these a few years ago when somebody had them on sale) and 48.0 grains of IMR 4064. This is the accuracy load in the Lyman reloading manual with a 150-grain jacketed bullet, and I know from prior development work it is superbly accurate in my Model 70. It is also a minimum load, which is nice given the 1903’s steel buttplate. The 1903 did well at 50 yards with the Winchester bullets, so I posted another silhouette target at 100 yards. I fired three rounds and it was rough shooting at that target. Using the aperture, I literally could not see the orange bullseye at 100 yards when I focused on the front sight. The orange bullseye disappeared until I shifted my focus to the target. I’d acquire the bullseye, then rapidly shift my focus to the front sight and squeeze the trigger. I did that three times, literally firing blind, and managed to get a 3.050-inch 3-shot group.

The 150-grain jacketed Winchester bullet load at 100 yards. I couldn’t keep the orange bullseye visible using the aperture at 100 yards.

I figured it was time to quit while I was ahead. I didn’t have any more black bullseye targets with me. I knew I would be able to see those focusing on the 1903’s front post while sighting with the aperture. But with the orange bullseyes (like you see in the target above), I might as well have been shooting at night. I returned to the range a few days later and shot at 100 yards with the jacketed 150-grain Winchester bullets (with the 48.0-grain IMR 4064 load), the 210-grain cast Montana bullets (with the 17.0-grain Trail Boss load), and the 168-grain Speer match bullets (with a 48.0 grain IMR 4064 load).

Using the rear sight aperture, I shot the target below at 100 yards with the 150-grain Winchester jacketed bullet and 48.0 grains of IMR 4064. I was pleased with the results and I quit after 3 shots (I didn’t want to screw up the group).

Three shots into an inch and three quarters at 100 yards. The load was 48.0 grains of IMR 4064 and the Winchester 150-grain jacketed soft point bullet. Old eyes and an even older rifle sometimes do great things. My rifle was manufactured in 1918; I was born in 1951.

I then shot at another 100-yard target with the 210-grain Montana cast bullet (these were loaded with 17.0 grains of Trail Boss). I used the rear sight’s lower notch for this target. Hmm, what do you know…the elevation was about perfect without moving anything on the rear sight.

Another 100 yard target, this time with the Montana 210-grain cast bullet and 17.0 grains of Trail Boss. I used the rear sight notch immediately above the aperture without making any adjustments. This is a real sweetheart load with minimal muzzle blast, almost no recoil, and no leading. The cast bullets are not as accurate at 100 yards as are the jacketed bullets, but they are still pretty good.

Finally, I fired eight rounds originally loaded for the Garand (I reload for the Garand in multiples of eight, as that’s what a clip holds), returning again to the rear sight aperture. This load used the 168-grain Speer jacketed boattail hollowpoint bullet and 48.0 grains of IMR 4064 propellant. The Speer bullets are almost identical to the Sierra match bullet, but the Speer’s ogive is slighly different and it has less bearing area in the barrel. I called the wizards at Speer about that and they recommended going to a heavier charge than would be used with the comparable Sierra bullet (they specifically recommended 48.0 grains of IMR 4064 for the Garand). That load was a little warm in the 1903 (the recoil was significantly more than the 150-grain Winchester bullet and the primers had slight flattening). But it was reasonably accurate.

Eight rounds of .30 06 ammo loaded for the Garand, using the 1903 rear sight aperture, at 100 yards. The astute blogophile will note there appears to be only seven holes; the hole just outside the 10-ring had two bullets pass through it.

My observations and conclusions from the above are:

- The 1903 Springfield rear sight is needlessly complex for an infantry rifle. You may feel differently. Hey, go start your own blog.
- With my cast bullet loads, there was no leading. My cast bullets had gas checks (the little copper cup on the bullet base), which helps to prevent leading.
- The Lyman cast bullet book showed a minimal 5744 load to be the accuracy load for the 210-grain Montana cast bullet. I did not find that to be the case.
- Both the Hursman 173-grain and the Montana 210-grain cast bullets were extremely accurate with 17.0 grains of Trail Boss, at least at 50 yards.
- The Winchester 150-grain jacketed bullet accuracy load, per the Lyman manual, was with 48.0 grains of IMR 4064. I found this to be a very accurate load. I didn’t do a lot of work developing a jacketed bullet load. I’m going to stick with this one for this rifle.
- Orange bullseyes and aperture rear sights don’t work with my old eyes at 100 yards. They are okay at 50 yards, but not 100 yards.
- Both of the jacketed bullet loads I tried (the Speer Garand load and the Lyman 150-grain accuracy load) are accurate. Without adjusting the rear sight from the 150-grain jacketed bullet setting, the Garand load shoots a little high and to the right, but the group size would fit into the bullseye if the sights were adjusted.
- The cast bullets are not as accurate as the jacketed bullets at 100 yards. The cast bullets are comparabily accurate to jacketed bullets at 50 yards, but not at 100.

With regard to shooting both cast and jacketed bullets in the same rifle, I got lucky: As complicated as that 1903 Springfield rear sight is, I found that one rear sight position shoots to the same point of impact at 100 yards for both my cast bullet accuracy load and my jacketed bullet accuracy load. Yep, you read that right. With the rear sight crossbar secured as you see in the photo below, I can use the aperture (denoted by the right arrow) with the 150-grain jacketed bullet load. Or, I can use the lower crossbar notch (denoted by the left arrow) with the 210-grain cast bullet, 17.0 grains of Trail Boss load. Both will shoot to the same point of impact at 100 yards. A friend asked if I tuned the loads to do this. I wish I could say I had that kind of load development expertise. Nope, I just got lucky.

One size fits all (sort of). With the 1903’s rear sight in the raised position, I use the notch denoted by the arrow on the left for my cast bullet accuracy load at 100 yards. I use the aperature denoted by the arrow on the right for the 150-grain jacketed bullet load at 100 yards. I don’t need to move the rear sight cross bar up or down. Sometimes you just get lucky.

One final note that’s sure to set the Internet on fire: I know this is heresy. As much as I like my 1903, I think the 91/30 Mosin Nagant is a better rifle. My Mosin groups better at 1oo yards. But that’s a story for another blog.

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Good buddy Greg admiring my M1922 Springfield on the range this past weekend. This rifle is about as old as Greg is, but it looks like it left the factory last week. It’s super collectible.

So, what’s this all about? A tale of two Springfields? Well, the topic is Springfield rifles, and specifically, the 1903 Springfield and its variants. I own two, and I think they are two of the finest firearms ever made. One is a 1903A1 with a scant stock (more on that in a bit). It’s a recent acquisition of a century-old rifle, and mine is essentially in as-new condition. It was gunsmithed from selected components so it’s not an original rifle, but I don’t care. I bought it to shoot it, and that’s what I’m doing. My other Springfield is an M1922, a special number chambered in .22 Long Rifle. It’s a magnificent rifle, it’s one I inherited from my father, and it is an amazing firearm. It’s in pristine condition, and boy oh boy, can it shoot!

The challenge here is to keep this blog short. There’s just so much to tell when the topic is the 1903 Springfield rifle and its variants. I’ll do my best to keep it manageable.

The M1903A1 Springfield, chambered in the mighty .30 06 cartridge.

The M1922 Springfield, which shoots the much smaller .22 Long Rifle cartridge.

The Reader’s Digest version of the story goes like this…although we won the Spanish American War (and its Battle of San Juan Hill probably put Teddy Roosevelt in the White House), we very nearly got our butts kicked by the Spaniards. We were armed with antiquated, big-bore, rainbow-trajectory, single-shot rifles. The Spaniards had modern 7mm Mauser bolt action rifles, which were flatter shooting, faster (both in terms of reloading time and bullet velocity), and far more accurate. It was a dicey victory for us, and shortly after, the US Army incorporated the 1898 Krag rifle. We had to keep up with the Spanish Joneses.

While the Krag was a bolt-action rifle, it was not without problems, and we quickly developed a new rifle based on a modernized Mauser action initially chambered in a round called the .30 03. It fired a .308-inch diameter bullet (which is where the .30 part of the .30 03 name came from) and it was adopted in 1903 (which is where the 03 came from). We then improved the cartridge a bit in 1906 and it became the .30 06, or simply, the ’06. The ’06 is one of the world’s premier hunting cartridges, and many folks think is the best all-around cartridge on the planet. I’m one of them, but I digress. One more photo, and then back to the story.

A modern Winchester Model 70, chambered in the 102-year-old .30 06 cartridge. That wild boar, late of Arizona, fed us for a year!

Like I said, the original Springfield rifle was cambered for the .30 03 and the rifle was designed as the Model 1903. The .30 03 only lasted a short time and all of the 1903 rifles chambered for it were recut for the improved .30 06, but the rifle’s name remained the Model 1903. These early ones were cool, with straight grip stocks and elegant (but complex) rear sights. Then the rifle got a pistol grip stock, which I think looked cooler, and they became the 1903A1 rifles. Then they were made with stocks that were supposed to be straight grip stocks, but the Army wanted the pistol grip and the arsenal’s walnut blanks did not have enough meat to allow for a full pistol grip. The solution was to get as close as possible to a pistol grip from a straight grip walnut blank, which resulted in a shallow pistol grip; these became the “scant” stocks (presumably so named because the wood was too scant to allow a full pistol grip).

The 1903A1 “scant” stock. Note the relaxed pistol grip aft of the trigger, and on this particular rifle, the crisp Springfield Armory cartouche stamped into the walnut.

Check out the 1903’s early, complex, adjustable rear sight. There’s was a lot of machine time and money there. The Army needed something less expensive.

Load development for the 1903A1. These were cast bullets loaded with IMR 3031 powder. This particular rifle prefers jacked bullets with IMR4320 powder.

Later, the Army realized that the 1903’s fancy rear sight and other features were overly-expensive for a standard-issue battle rifle, so the ’03 was “value engineered” to make it less costly to manufacture. These became the Model 1903A3 rifles, often referred to simply as the ‘03A3.

Somewhere while all this was going on, the Army introduced versions of this rifle chambered in .22 Long Rifle. They were intended to be trainers, but they proved to be exceptionally accurate and the Army’s shooting teams (and others) competed with them.

The .22 Long Rifle cartridge (fired in the M1922 rifle), and the .30 06 Springfield cartridge (fired in the Model 1903).

The M1922s are phenomenal rifles, they are rare, and they are expensive in those rare instances they come on the market. My Dad bought one released through the Civilian Marksmanship Program 60 years ago for $25. Today, when one changes hands, you can bet the price is somewhere around $3,000. They’re that rare, and they’re that good.

The starboard side of the M1922. It is an elegant rifle.

Lyman competition aperture sights on the M1922.

The M1922’s Lyman aperture front sight. This rifle has “peep-to-peep” sights; both the rear and the front sights have holes to allow “peeping” at the target. They work very, very well.

You might be wondering: How do these rifles shoot?

Very well, thank you.

The M1922’s results at 50 yards. On the first bullseye on the left, the lone shot out of the black (at the 12:30 position) was the first shot of the day, fired from a cold and wet barrel.

Targets shot with the Model 1903A1. The one on the left was terrible; I shot it with cast bullets at velocities too high for the bullet (the lead smeared in the barrel and the bullets wouldn’t group). The remaining four were shot with one of my favorite .30 06 loads (a 130 grain Hornady jacketed soft point bullet and 52.0 grains of IMR 4320 powder).

So, what happened to the 1903 as a military rifle? It served in World War I (although we couldn’t make them fast enough, so another rifle, the Model 1917, accounted for more than half the US battle rifles during the Great War). By the 1930s, we were already hard at work developing the Garand (that rifle fired the same .30 06 cartridge, and it was a semi-auto). The Garand became the US Army’s standard rifle in World War II. Interestingly, the US Marines stuck with the 1903 going into World War II, but they, too, soon switched to the Garand. The 1903 evolved into a specialty item. It was still recognized as phenomenally accurate and it became our sniper rifle in World War II (with a telescopic sight, it became the 1903A4).

Like I said, all of the above is the Reader’s Digest version of the story behind the Model 1903 rifle. The definitive reference on the 1903-series Springfield rifles is Joe Poyer’s The Model 1903 Springfield Rifle and Its Variations, and if you have a deeper interest in these historic and fine rifles, it is a book you should own. You can find it on Amazon.