Guy Miner
Master Loader
- Apr 6, 2006
- 17,869
- 6,456
We recently tested IMR 8133 and found it a very good fit for overbore cartridges. Link takes you to both the written article and the Ultimate Reloader video:
ultimatereloader.com
Regards, Guy
TESTED: IMR 8133 Smokeless Powder – Ultimate Reloader

Regards, Guy