I have a 1:10" twist on my .338 WM, and as others have noted, it will serve you well for the majority of the bullets. "I" found that 225 NAB (1.45" OAL) is about the max bullet weight and OAL for mine. Some of the high BC bullets, esp. the monos, are long, i.e., Berger 250 EH is 1.67", BD2 225 is 1.68", BD2 250 is 1.873" and might be too long for the .338 WM's COAL, unless your action/set-up has room for a longer COAL. Good luck!My next build is going to be a .338 WM. What is the best twist rate for 225-250 grain high BC bullets? Thanks
You will be fine but Bergers twist Calculator will answer your question toohey guys i'm new to this but i have a 338 LM rifle , barrel twist 1:9.25 i run a 285 grain projectile but i was wondering if its possible to use a 300 grain berger OTM is that a ideal barrel twist for that grain bullet?
Its little higher than I like but I think you will be fine. In all likelihood your SG will be little lower i dont think you will be pushing the 300 at 3250So in other words SG 2.03 would be ok?