Originally Posted by Tom D
.3535 seems a little small for a 9mm. My understanding is bullet/bore interference should be about .001/.002 so I'd say your not too small.
The issue w/ measureing a cast bullet driven into the lands is spring back. Plus most can not accurately measure below 0.001" w/ calipers, you would need a micrometer to be more accurate.
I am betting you air cool the clip ww, things will get much better. IME, there is little to be gained by super hard bullets @ most handgun pressures. Maybe for max loads, but not where the OP is at. I run clip ww, air cooled, to 1500fps in my 45-70 w/ little leading.
"Given adequate penetration, a larger diameter bullet will have an edge in wounding effectiveness. It will damage a blood vessel the smaller projectile barely misses. The larger permanent cavity may lead to faster blood loss. Although such an edge clearly exists, its significance cannot be quantified".
Last edited by fredj338; 12-26-2012 at 21:44..