![]() ![]() Once everything was set, I now get one, ragged 10 shot hole at 10 yards. I purchased the Lee 38 S&W expander, swapped it into the Lee power through expander die, did the plunk test to determine the COL. ![]() I worked on the two P226’s for three years with different loads, bullet diameters, powders, etc, to no avail. I also have Springfield 1911 that was extremely accurate with my cast bullets. I’ve two P226’s, shot lousy with cast bullets. ![]() I'm using a Lee 38 S&W expander plug in the Lee 9mm powder thru expander die when loading 0.357"/0.358" dia bullets Pulled bullets also give a good indication of the amount of crimp, I back off until there's no ring mark on the bullet. … and plunk test them before pulling them I looked at the sammi specs for 9mm cartridge and chamber to determine the max case wall thickness with a 0.358" bullet that will plunk in the standard chamber and I think that bullet dia will work with most range brass, I'm hoping anyways.Įdit: the chamber dia.'s are all +0.004/-0.000. I did see some improvement going from 0.356" dia to 0.357" coated. I'm looking to get as good or better groups than I get with 0.355" dia. I just ordered some 0.358" coated bullets for 9mm, looking for better accuracy, and may run into the same problem as you. Remington-Peters (R-P) brass has an old reputation of being thinner and other brands have shown to be thinner for some, like Blazer, Speer, and FC. I have 4 different barrels to plunk test, with the tightest/shortest chambered being a Storm Lake aftermarket barrel for a glock. I have loaded 9mm bullets up to 0.357" in assorted range brass and have not had any failure to plunk test to date. ![]()
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