Thread: The Importance of Using the Right Data

264WM or RM are good examples where the cartridge/calibre is largely fallen out of favour these days, and has been for some considerable time. Hence load data with modern powders and let alone the newer high bc pills, is very hard to come by. For 264WM you really need a slower burn rate powder than 2213 or 2217. Powders like 2225 or even better RL33 is what I’ve been playing around with lately. In lack of much published data you have to start on conservative end and work up slowly and carefully.