I decided to try something, and wandering if it has been done or tried? I had a few more cases than I had Lee 230grain so I PCd some 309-170 Lee GC bullets without the gas check. I seated them to 1.905 that was where I stopped at the crimp groove. I put 10.5 grains of H108 behind them settled on that because it was mid data for AA9 and a 180. Has anyone tried a bullet of this design in the blackout? I’m not worried about the not using a gas check, I’m more concerned with the seating depth than anything. The book says 1400 out of a 16 inch, but I figure the 8 inch will be in the 1100 to 1200 range. I know there is no way to know without testing, but has anyone tried something with a similar bullet? Bullet weighs out to 177 is why I went with 180 data.
Pic is a Lee 230 in orange and the 170 in green. It’s a bad looking little round. What you guys think?
Pic is a Lee 230 in orange and the 170 in green. It’s a bad looking little round. What you guys think?