quicksylver
Well-Known Member
Ii'd love it if someone would try this and see what THEY get. https://www.artfulbullet.com/index....tol-vs-large-rifle-primers-w-pb-bullets.8026/
Primers LP vs LR
- Thread starter shuz
- Start date
Folks--I contacted Federal Cartridge Corp and received an answer that There are many differences between large rifle and large pistol primers. Different anvils, cups, priming compounds both quantity and type, as well as different heights.
It's no wonder that they can give different results when interchanged.
It's no wonder that they can give different results when interchanged.
Matt
Active Member
The attached target photo shows how well pistol primers can work in rifle loads. As stated earlier I’ve found that pistol powders give the best performance with pistol primers in rifles cases. Sako .308, 3 - 5 shot groups at 100 yards. Lee 312160 as cast with two coats 45-45-10, 10.0 grains Red Dot, and Federal large pistol magnum (No. 155) primers. The second group has a “called” flyer. It was 95 degrees, heavy mirage and shifting 10-12 mph winds and I fired before I intended.
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Matt
Active Member
I’ve finished a 200 round test comparing rifle and pistol primers using 4198 in 6PPC. The load was as follows:
Lapua 220 Russian case converted to 6mm PPC
13.0 Grains IMR 4198
NOE 85 grain FP all weighing 78.8 gr +\- .1 gr
sized .244 lubed with Ben’s Red Hornady gas check
100 rounds loaded with Remington 7 1/2 Bench Rest primers
100 rounds loaded with Federal small pistol magnum “match”
Fired over serval days in 4 , 5 round groups alternating between primer types, with cleaning and cool down between each set of 4 5 shot groups.
Ave. for 20 5 round groups w/rifle primer 1.508”
Ave for 20 5 round groups w/pistol primer 1.902”
The load with the Remington primer is my standard “match” load in this rifle. The test has increased the aggregate of all 5 shot groups fired with this load from 1.1” to 1.29”. I’ve learned that the little fat NOE bullet does not like the wind. The 200 round test was fired in temperatures that varied between 80 and 96 degrees F. Wind varied between 7 and 15 mph from various directions. Mirage would switch from boiling to flowing across the target like water. These are standard conditions at my range and I’m fairly poor at wind doping. All of the groups show some horizontal dispersion from bad winds guesses. The pistol primer loads also showed vertical dispersion. I’ve seen this before when using rifle powders and pistol primers. There was also noticeably more black fouling on the patches when cleaning after the pistol primer loads were fired.
I’m thinking about trying to find a Red Dot/Bullseye/231 type load with pistol primers that will group as well as the Remington BR/4198 load to further test my theory about rifle primers for rifle powder and pistol primers for pistol powders.
I’d still like to get consistent sub MOA groups with cast in competition for 5 and 10 shot groups. I believe the secret is casting better bullets. The rifle is a solid .4” performer with jacketed loads so I assume the rifle itself is not the limiting factor.
Lapua 220 Russian case converted to 6mm PPC
13.0 Grains IMR 4198
NOE 85 grain FP all weighing 78.8 gr +\- .1 gr
sized .244 lubed with Ben’s Red Hornady gas check
100 rounds loaded with Remington 7 1/2 Bench Rest primers
100 rounds loaded with Federal small pistol magnum “match”
Fired over serval days in 4 , 5 round groups alternating between primer types, with cleaning and cool down between each set of 4 5 shot groups.
Ave. for 20 5 round groups w/rifle primer 1.508”
Ave for 20 5 round groups w/pistol primer 1.902”
The load with the Remington primer is my standard “match” load in this rifle. The test has increased the aggregate of all 5 shot groups fired with this load from 1.1” to 1.29”. I’ve learned that the little fat NOE bullet does not like the wind. The 200 round test was fired in temperatures that varied between 80 and 96 degrees F. Wind varied between 7 and 15 mph from various directions. Mirage would switch from boiling to flowing across the target like water. These are standard conditions at my range and I’m fairly poor at wind doping. All of the groups show some horizontal dispersion from bad winds guesses. The pistol primer loads also showed vertical dispersion. I’ve seen this before when using rifle powders and pistol primers. There was also noticeably more black fouling on the patches when cleaning after the pistol primer loads were fired.
I’m thinking about trying to find a Red Dot/Bullseye/231 type load with pistol primers that will group as well as the Remington BR/4198 load to further test my theory about rifle primers for rifle powder and pistol primers for pistol powders.
I’d still like to get consistent sub MOA groups with cast in competition for 5 and 10 shot groups. I believe the secret is casting better bullets. The rifle is a solid .4” performer with jacketed loads so I assume the rifle itself is not the limiting factor.
