By Joe Berk
This one is going to get a bit complicated and maybe a little bit long. Bear with me. I’ll do my best to make it interesting.

I tried two loads in this session. Both used the Xtreme plated 230-grain .451 roundnose bullet seated to an overall cartridge length of 1.260 inches, CCI 300 primers, R-P .45 AutoRim brass, and Bullseye powder. One load had 4.2 grains of Bullseye; the other had 4.5 grains. I shot 18 rounds of each flavor at targets 25 yards away, using a two-handed grip. I measured velocity using my Garmin chronograph. Four things were immediately apparent:
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- The 4.5-grain Bullseye load grouped much better than the 4.2-grain load.
- Both loads were approximately 4.5 inches below the point of aim at 25 yards.
- Recoil from the 4.5-grain Bullseye load was perceptibly higher than the 4.2-grain load.
- The 4.5-grain Bullseye load velocities were significantly higher than the 4.2 grain load.
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You can see the accuracy difference (and the fact that both groups shot low) in the two targets below:


Here’s what the chronograph data looked like:

I wrote about the first data row in the above table in a previous blog (that load used a powder-coated 230-grain bullet loaded with 6.0 grains of Unique powder). The second and third data rows are the ones of interest in this blog. These two rows show the copper-plated roundnose Bullseye loads.
As I fired the loads for the two targets above, I kept an eye on the velocities and I thought I saw a decrease when shooting the first round through the sixth round in each cylinder. I wondered if this was due to bullet pull. That’s when the bullets pull forward in the case due to recoil (the bullet wants to stay put as the gun recoils). In extreme cases, the bullet can pull forward far enough such that it protrudes from the cylinder and interferes with cylinder rotation. I wasn’t seeing that, but I thought that what might be happening is the bullets were pulling forward a little bit with each shot and progressively increasing the case volume behind the bullet base. That would result in lower pressure and reduced velocity.

I ran a test with each load to identify how much of this was occurring (see the table above). I loaded six rounds, fired five, and then removed the sixth round to measure the increase in cartridge overall length. The cartridge overall length prior to firing was 1.260 inches. After firing five rounds and pulling the sixth, with the 4.2-grain Bullseye load the cartridge length increased to 1.286 inches (the bullet had moved forward 0.026 inch due to recoil from the other five rounds). With the heavier recoil 4.5-grain Bullseye load, the sixth cartridge’s overall length increased to 1.291 inches (its bullet had moved forward 0.031 inch). As expected, the hotter load had resulted in slightly more bullet pull.
To further assess the external ballistic effects, I plotted velocity versus shot number for all 18 shots for both loads. I was expecting to see the velocity decrease as I fired each six round group, but the chronograph data and the x-y plot shown below didn’t show that. I then posted a trendline for each load, and they are essentially flat (actually, the trendline for the 4.5-grain Bullseye load shows the velocity increasing, but the increase is so slight it is probably not meaningful, and another 18-shot string might show the velocity trend to be flat or slightly negative). It was an interesting hypothesis, but the data didn’t support it.

You might wonder: Could I increase the crimp a bit more and eliminate all bullet movement? Not with these bullets. The crimp is already pronounced and I’m still getting a bit of bullet pull. These are slippery bullets. I’ll live with what I’m getting, and the velocity data shows the small amount of bullet pull is inconsequential.


Let’s turn back to the subject of the gun shooting too low. We covered this in an earlier blog shooting lighter bullets. I found that I could hold the front sight higher in the rear sight, use the traditional 6:00 hold, and get decent results on target. I decided to leave the front sight alone. It is a real shark fin, but it is what the original 1917 front sight profile looks like. That got me to wondering: Did those original 1917 revolvers shoot low, too?

I think the answer is yes. I’ve never shot an original Smith and Wesson 1917 with hardball ammo (or any ammo, for that matter). But in poking around a bit on the Internet looking at photos of the original guns, I noted that some owners had modified their front sights to make them shorter (which would raise the point of impact). I suspect this was done for the same reason I considered doing it. Their guns were hitting too low. The modified 1917 front sights, however, don’t look right to my eye. I’m going to leave my front sight alone.
While pondering all this, I had another thought: When the 1917 revolvers were issued to soldiers in World Wars I and II, our soldiers were trained to shoot these handguns with one hand, like bullseye competition shooters still do. The two-handed Weaver hold that we use today didn’t come on the scene until the 1950s. I wondered if shooting one handed would shift the point of impact up. I think the answer is yes, because the muzzle flip would be more pronounced with a single-hand hold.
Because it was late at night when I was writing this blog, I couldn’t get to the range immediately to check this hypothesis. But I could ask Google and see what it had to say. Here’s the question I asked:
How much higher will a .45 ACP revolver shoot at 25 yards using a one-hand hold vs a two-hand hold?
Here’s how Google responded:
There is no single fixed number, as the shift depends on individual hand strength, gun weight, and bullet weight, but a .45 ACP revolver will typically impact 2 to 4 inches higher at 25 yards when fired one-handed versus two-handed. Because a bullet travels relatively slowly through the barrel—especially heavy, low-velocity .45 ACP rounds—the gun begins to recoil upward before the bullet exits the muzzle.
I read that and thought to myself: Duh. Well, yeah. Of course. I was surprised I didn’t tumble to that sooner.
I’m the kind of guy that has to pee on the electric fence to find out for himself, so the next day I went to my indoor range (it’s been too hot to shoot on the West End Gun Club’s outdoor range). I set up a target at the 50-foot line and fired a cylinder full with one hand to test my new-to-me (but obvious to probably everyone else) hypothesis.
I have to tell you: I haven’t shot bullseye pistol competition in decades, and holding the big Smith 1917 up with one arm, at arm’s length, was a challenge. The revolver was sashaying around like an exotic dancer in a room full of big tippers. But I heard Sergeant Major Hickman’s voice from 53 years ago: You’re not going to get it rock steady unless you’re dead. Just do your best, focus on the fundamentals, and let the fundamentals do the work. So that’s what I did, and son of a gun…

The revolver still shoots a little low, but it’s close enough for government work. I may start shooting Bullseye-style again. It felt good. I’d like to get better at it.




























