I am trying to subdue this monster of a cast boolit round, 6.5x55se 140gr from a RCBS mould. I have tried PC with and without gas checks and with normal lube with and without gas checks. I am now working on gas checked with Alox. I am sure my alloy is too soft, 10-12 BHN.
I now have some linotype to harden it up and I am wondering what BHN I should be trying to get to when mixing it with my range scrap. Not to hard. Not too soft. From what I have found, this round is a tough nut to crack.
I am looking for those who have experience with this round and the Swedish rifles. Not just a general BHN for cast boolits.
I am shooting a CG 63 with a lower twist rate than the original military versions.
How many of you have tamed this beast?
Thanks for all advice, even load development if you want.