And that means greater reliability in the AR system.
I don't know if it's advisable, but I know a guy that uses Small Rifle Magnum primers in his .223 loads for his AR. He claims he gets better powder burns with H335 I think it is. Of course he is a loudmouth know it all and thinks he gets his stuff cheaper at Cabella's. (never mind that I called Cabella's and they are 2 bucks more not including the gas and time to drive out to get it. I don't want to spoil him) But he is sometimes right. About this though -I don't know.
Anyone have thoughts about the use of Magnum Primers for you AR loads?
The biggest seller is BLC2 powder. We can't keep it in stock.
The magnum primer vs regular primer issue came up on the reloading board here... http://wethearmed.com/index.php/topic,1325.0.html
I did an experiment with BL-C(2) powder to see if it matters in .223, and in my case comparing CCI magnum SR primers to Winchester SR primers, it did. (Best comparison would have been CCI primers exclusively, but that's what I had to work with).
Shooting 55FMJs out of a 16" Bushmaster, I got
223, 55FMJ and 27.5 grains (published max) BL-C(2) in Bushmaster XM15 with 1/9 16" barrel, col 2.215":
WinSR primers --> 2815 +- 53 fps (sorry for the high SD, this is just 5 in a row).
CCI#450 mag SR primers --> 2895 +- 25 fps
So by my experience the magnum primers got me a significant increase in muzzle velocity. I like BL-C(2) because it's so versatile, but when I use up my keg of it I may well try a different powder that's better for .223 Having a 16" AR carbine, I know I shouldn't expect 3300 fps with 55FMJs. But darn it, my S&B commercial ammo (55 grain) gets over 3000 fps, I ought to be able to do that too and it bugs me that I can't with a max load of BL-C(2)! This load I tested is fine accuracy wise and shoots ~ 1 MOA, but I'd like to fully duplicate the muzzle velocity of factory ammo and ain't gonna happen with BL-C(2).
I also tried this experiment for 30 M1 Carbine rounds using W296 powder, and there the magnum vs regular primer made no real difference in muzzle velocity.