All,
So I went ahead and made up some test loads using the 350gr Interlocks. Batch of 20 rnds using AA1680, loaded in sets of five with 38.0gr, 39.0gr, 40.0gr and 41.0gr in them. COAL was initially setup at 2.260. Now here's the rub....
After I dropped the powder and seated the bullet, I used the modified .45/70 die to give them a good solid crimp. After doing this, the COAL jumped up to 2.270. What gives? Was my crimp so excessive that I squeezed the bullet out further? (Like squishing a bannana in your fist?)
Brass history is 7X fired and annealed prior to this loading.
Has anybody ever come across this before?