Lee reloading dies – The ExhaustNotes Blog

I’m in the money with the Mark V .300 Weatherby now, but it took some doing to get there and the journey isn’t over yet. My recent reloads with this rifle were all over the place at 100 yards. I suspected it was more me than the rifle (or the loads) and I was probably right about that. This rifle has serious recoil, way more than I am used to. I was developing a flinch in anticipation of getting whacked by the Mark V.

I have a friend who shoots the .300 Weatherby a lot, and he’s about the same size as me. I thought about him a bit, mentally picturing him on the range, and then I realized: He uses a shoulder pad. It was a click or two on Amazon until I found the Caldwell recoil shield.

I had the Caldwell recoil shield the next day, and I had to play with it a bit to find how to wear the thing. I bought the thickest version, figuring that if some is good, more would be better.

I next researched the Internet to find ways to improve my bench rest technique and I immediately found two improvement opportunities: Parallax, and how I positioned the rear rest.

With regard to parallax, it’s a real thing and a real issue. Most scopes don’t have any adjustment for parallax, but the 4×16 scope I have on the Mark V does. To adjust for parallax, you set the rifle in the rest and put the cross hairs on the target. Then, without touching the rifle, you move your head around and see if the reticle moves around on the target. On a scope with parallax adjustment, what I read is that you ignore the markings on the parallax adjustment and move your head around, adjusting the parallax adjustor until the parallax is minimized. I couldn’t completely eliminate the parallax on my 100 yard target, but I was able to greatly reduce it. After making the adjustment I looked at the scope objective (the parallax adjustment feature), and what do you know, it was right on the 100-yard mark. I guess those Weaver boys knew what they were doing.

I had a rifle with me that has a non-parallax-adjustable scope and checked it for parallax at 100 yards, and wow, when I moved my head around the reticle was moving around a good 3 inches on the target (left to right, and up and down). To control parallax with a non-parallax-adustable scope, the trick is to get your eye in exactly the same spot every time. In fact, that’s good technique with any scope.

The next thing for me was to get the rear rifle rest directly under where my face rested on the stock. You can see the front and rear rest in the large photo at the top of this blog (I use Caldwell equipment). The idea behind getting the rear rest directly under where your cheek contacts the stock is that the downward force from your cheek is transmitted directly through the stock into the rear rest without flexing the stock. It may not seem possible (or even detectable), but if your face is ahead of the rear rest or behind it, you will impart a torque into the rifle and it can be enough to shift the point of impact at 100 yards.

On to my loads: I reloaded the next set of .300 Weatherby cartridges, going with 73.0 grains of IMR 7828, the CCI 250 magnum primer, 200-grain Sierra MatchKing bullets, and every trick I knew of to improve accuracy. This is a relatively light load. I neck sized three different sets of brass (fireformed .300 Remington cases made from .300 H&H brass, Remington .300 Weatherby brass, and Weatherby brand .300 Weatherby brass). I have a Lee .300 Weatherby collet die that squeezes the neck down to size, and I used brass I had previously fired in the Mark V rifle. I also seated the bullets out much further (the reloading manuals all show the cartridge overall length to be 3.560 inches, but I seated the Sierras out for an overall length of 3.718 inches). The Weatherby Mark V rifles have a lot of freebore. The cartridges still fit in the magazine and the bullets did not contact the rifling, so I was good to go.

It was a quick trip to the West End Gun Club and I had the range to myself. I got everything set up, pulled on the Caldwell shoulder pad, and went to work. The Caldwell shoulder pad was awkward at first (as you might imagine), but it was wonderful. The .300 Weatherby Magnum is still a beast, but the Caldwell pad did its job. It greatly alleviated my fear of getting clobbered every time I squeezed the trigger and my groups tightened up immediately.

So my groups were way better, but I had a new problem. Many of the cases were sticking in the chamber after firing. The bolt would rotate freely, but the cases didn’t want to come out. When I pulled harder on the bolt, the extractor popped over the rim and the case stayed in the chamber. I had to tap the cases out with a cleaning rod. Other than the cases sticking, there were zero indications of excess pressure. No flattened primers or anything. The Remington cases were sticking almost 100% of the time (both the fireformed .300 H&H cases and the .300 Weatherby Remington cases). The Weatherby brass did not stick in the chamber, although a couple felt like they wanted to.

On to the good news: My best group was a .608-inch 3-shot group at 100 yards, which ain’t half bad on a fire-breathing monster like the .300 Weatherby. Before you trolls tell me I should shoot 5-shot groups, I will share with you that in my experience it’s pretty difficult to get animals to sit still for five shots. If your dead set on being critical, let’s get your butt out here. I want to watch you shoot 5-shot groups with your .300 Weatherby.

The next morning, after cleaning the rifle, I rechambered a couple of the fired Remington cases, and then when I withdrew the bolt the cases stuck in the chamber again. And again, I had to tap them out with a rod. The Weatherby brass did not, but it was tight. I measured each of the cases that stuck, and they all met the SAAMI .300 Weatherby specification. My conclusions are:

- - I don’t have an excess pressure situation. I loaded at the bottom of the propellant range, the bolt rotated freely, there were no pressure signs on the case base, and the primers were not flattened.
  - Neck sizing on my .300 Weatherby Mark V is not a good way to go (notice I said mine; your mileage may vary). I full length resized one of the cases that stuck (a Remington case) and it chambered and extracted easily. Weatherby brass is better (but it is hard to get).
  - I need to full length resize when reloading for this rifle.
  - The Weatherby Mk V extractor is weak. For a dangerous game rifle, that’s not a good thing. Maybe the extractor spring is weak.

I think the real issue was the neck sizing approach. I’m out of IMR 7828 propellant (powder goes fast with the 300 Weatherby) and no one seems to have any in stock, so I’ll try either H1000 or IMR 4831 next. Like we always say, stay tuned.

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I reload with Lee Precision equipment.

Sometime in the late 1970s, when I was an engineer on the F-16 program at General Dynamics in Fort Worth, Texas, I visited a company called National Water Lift somewhere in the Great Lakes area. What we bought from NWL had nothing to do with water (they made the F-16’s hydraulic accumulators). It’s a lead into this story, which is about my Browning B78 rifle. You see, every time I had to visit one of these distant places on my business travels, it was an opportunity to check out the gun shops in the area. Which I did, and the one that stuck in my mind had a Browning B78.

The Browning B78 Rifle

The B78 was a competitor to Ruger’s No. 1 single-shot rifle, and the design was basically a resurrection of the old Winchester High Wall. Ruger did surprisingly well with the No. 1 back in the 1970s (the idea of a single-shot rifle was intriguing to me and many others), and I guess Browning wanted in on the action (pardon the pun).

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Rugers outsold Brownings probably 10 to 1 (or more) in those days because they were less expensive and Ruger’s marketing was better. But the Browning was (and still is) a very elegant rifle. I saw one at that store (I want to say it was in Kalamazoo, Michigan, but I can’t remember for sure), and it was nice. It was a 30 06 and it had an octagonal barrel, which was all very appealing. But the Browning was a good $100 more than the Ruger and in the 1970s, that kind of money was out of my reach.

Good Deals on Gunbroker

Fast forward 40 years, the Great Recession was upon us, and all kinds of exotic and collectible rifles were popping up on Gunbroker.com (a firearms auction site). I saw what appeared to be a nice B78 on Gunbroker, with an octagonal barrel, in God’s caliber (that would be .30 06), and I pounced. I paid too much, but we never say it that way. I bought too soon. Yeah, that works. I just bought too soon.

A earlier photo from one of my first range trips with the Browning B78. .30 06, one shot, great walnut, an octagonal barrel…this rifle is elegant.

The B78 is sharp from either side. That’s a Weaver 2×7 scope, and it gets the job done.

After I bought the B78, I wanted to put a period-correct scope on it (you know, from the 1970s) and I found a nice Weaver 2×7 on another auction site. Weavers are good scopes and the ones from the 1970s were blued steel and made in America. It was just what the doctor ordered, and it looks right at home on my B78.

My B78 is used, and it’s got a few nicks and dings on it. But the metal work is perfect, and the walnut is (in my opinion) exhibition grade. Take a look, and you tell me.

Good wood. This is exhibition grade walnut…

Preferred B78 .30 06 Jacketed Loads

I’ve owned the B78 for about 10 years now, and it’s been a lot of fun. I’ve never seen another B78 on the rifle range, and I’ve certainly never seen one with an octagonal barrel. It’s just a cool firearm. But it is finicky. It likes heavier bullets and with the right load it’s accurate, but getting there took a lot of experimenting, a little bit of forearm re-bedding, and a lot of load development. I’ve got two loads that do very well in it…one is a heavy-duty jacketed load, and the other is a cast bullet light load. The heavy load is with a 180 grain Remington jacketed softpoint and a max load of 4064 (I’ve shot three-quarter-inch groups with this load at 100 yards). That load has big recoil, but it’s tolerable. I tried 180 grain Nosler bullets (that’s a premium bullet), but the rifle does way better with the less-expensive Remington bullets. That’s a good thing, because I found a good deal on 900 of those bullets and they have a home on my reloading bench now.

A Preferred B78 Cast Load

My cast bullet load is a short-range low power load, and it’s recoil is almost nonexistent compared to the jacketed load. It’s a 180 grain cast lead bullet (with a gas check) and 17.0 grains of Trail Boss power. After zeroing the Browning for the jacketed bullet load mentioned above at 100 yards, I had to crank the scope up a cool 85 clicks to bring the cast bullets back on paper at 50 yards (I was surprised there was that much adjustment in the scope). But wow, those cast bullets at 50 yards cloverleafed consistently. It was essentially putting them through the same ragged hole. At 100 yards, getting the cast bullet load back to point of aim involved another 25 clicks of elevation on the Weaver, and again, I was surprised there was that much in the scope. At 100 yards, the cast load groups opened up to about 2 ½ inches, and that’s still okay. What’s nice is I can shoot the cast bullet load all day long. The barrel doesn’t heat up and the recoil is trivial. As you might imagine with a load like this and the gas-checked bullets, there was virtually no leading.

When I go for deer later this year, it’s going to be with this rifle. One shot. I think that’s all I’ll need. We’ll see.

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