I don't have a large amount of experience, but everything I have read has said not to over-crimp coated 9mm. I have had success with a couple of hundred hi-tek coated 147 grain bullets from Summit City. I am running them a 1.10" in both a CZ75B and Sig x5. with a .378 crimp they dont fit my shooters box case gauge perfectly, but they do chamber fine in both barrels.
My case gauge is tight enough that I need to crimp down to around .375-.377 for Jacketed bullets to allow them to freely seat and fall out. When I crimp my coated bullets that much it creates a cut line in the coating.
My case gauge is tight enough that I need to crimp down to around .375-.377 for Jacketed bullets to allow them to freely seat and fall out. When I crimp my coated bullets that much it creates a cut line in the coating.
