I have loaded thousands of hard cast lead bullets in 9mm and making sure the bullet is slighly oversized .356" vs .355" and I have never had a problem. Always watch OAL and make sure the taper crimp is consistant and you can get 9mm to shoot well with hard cast lead bullets. The bullet shape that always worked best for me is a round nose. Truncated cone nose can work, but each gun will either shoot it or it won't. Experimentation is needed.
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All my C&R guns are shooters
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