Moose:
The 220 gr weight splits the difference between the 200 and 250 gr bullet offerings. You can still use IMR 4895 or 4064
as the bullet mass is not critical yet ( IMR-4350 territory). Barnes manual shows loads, or you can interpolate
backing off from 250 gr loads and adding some velocity through your new loads.
Have been doing some IMR 3031 load development for 450 AK and Fuller M-71s. Using Alaska Bullet Works 400 gr bonded core and Hawk 400 gr FP.
Annealing necks and case shoulders in wildcat brass is a good idea-for the 348 also- for sure. Longer case life.
Been studying the benchrest candle method. Keeps the case head cool but stress relieves the neck-shoulder.
