3/16/2023 0 Comments 9mm brass with primers![]() ![]() I've found jacketed bullets that measured just under 0.355 (maybe 0.354 - 0.3545) but never anything smaller. Couldn't ID a suspect manufacturer.īy the way, unless I'm reading something wrong, the SAMMI spec for 9MM bullet diameter is 0.3555, +0, - 0.0030, which is 0.3525 to 0.3555. In addition, headstamps were all over the board US & foreign, Federal, Starline, Winchester, Blazer, Herters, etc. brass was shiny and lacking any damage. brass wall thickness, diameters (inside & outside mouth, base & rim), and length were all correct. Everything was well within SAAMI specs ( - bullet diameter was 0.355, these were plated Frontier bullets Perhaps there IS something to the fast burning powder theory of brass bashing.Ĭlick to expand.When I realized what was happening I verified every dimension I could. That would imply though not prove that black doesn’t mess with the brass much. Interestingly if one looks back to 19th century accuracy rifle shooting, using black, most of the shooters only used ONE case and reloaded for each shot individually. Not sure 5.56 cases benefit much from annealing my sense has been that it’s the larger cases that benefit. I have never annealed the cases mostly because I don’t have an annealer, though I’ve thought of it. SO FAR I have not had to full-length resize and have had about 6-8 reloads per case. Then I only neck size on reloading until the case walks enough to have to bump the shoulders. 20 Tactical, then moderately load to fire-form the case to the rifle. I use only Lake City brass, resize it to. 20 Tactical basically as an individually reloaded round each time. I bet DansSIGS uses the same brass for his rifle as that gives the best accuracy. Seems to make the recoil softer without necessarily losing speed. I’ve been using TiteGroup but am transitioning several calibres to Trail Boss. ![]() That’s not on the reloading tables for Super. I shoot a load that pushes a 130 gr plated bullet 1450 FPS. 38 Super for IPSC and haven’t had any issues with that brass other than losing some every match. I have never had much issue with pistol calibres but have never reloaded 9mm because so far it’s too cheap to spend the time reloading. I've told him that and he just shakes his head.īrass is funny stuff. I usually get around a dozen more reloads before I get a case failure. Because of this I quit counting how many times they're reloaded as it's not worth the trouble to me.Īs a side note, there's a guy who shoots Sporting Clays with a 20 gauge at the same place I do and he marks his hulls after 4 reloads, then discards them as unsafe. I've counted reloads up to around a dozen or so and then got tired of counting and continued to reload the cases. I reload brass until I get a brass failure like neck splits on handgun rounds and indications of incipient case head separation on high pressure rifle bottleneck cases. That's why we anneal bottleneck rifle case mouths. I would think that if the brass work hardened, then resizing/shooting would split the neck and that's something I do see on a regular basis. 45 ACP I've reloaded so many times the headstamp is hard to read and never seen the problem you're mentioning. I shoot at least 2 times a week, sometimes more. I've been reloading over 60 years for handgun and rifle brass and 50 years for shotgun. I’m curious what others have experienced. Never did this before but never had a problem. I’ve now starting counting the number of reloads. To be perfectly honest, I have no idea how many times this 9MM brass was reloaded. ![]() So sometime after reloading, not sure how long, maybe days, maybe weeks, but it was not immediate, the brass relaxed. The brass had been fired and resized enough times that it had become resistant to resizing. This occurred with only a couple of dozen cartridges out of a thousand, maybe 2%, but it was disturbing.Īfter months of investigation the cause was determined to be work hardened brass. So when the cartridge hit the feed ramp, the bullet, now loose, popped out of the ejection port and the powder was dumped. It reverted back to the fired dimensions. I had 9MM brass that looked perfect but after resizing and reloading, the brass relaxed and lost the resize. A recent series of failures forced me to rethink this. Until recently I always thought that cleaned brass that passed inspection (no cracks, dings, dents, etc.) was good brass for reloading. I’ve been reloading for about 30 years, but only for handgun calibers mainly 9MM and 45ACP, but also 40S&W, 38 Special and 357MAG. How many reloads do you get out of your brass? ![]()
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