Shortening the 338-378

[Swamplord]

You had to go and release this just 3 months after I finished my 338 rum, thanks man! What are you getting for velocity with 300 bergers? My rum is doing 2830 from a 28" barrel w/ N570.

the 338 Razor is shorter than the 338 Rum but larger in diameter, you can set the barrel back a bit and completely clean out the 338 Rum chamber including the throat, can do the same with dies by heat treating till cherry red, let cool then run a 338 Razor resize reamer into the sizing die, case hardening brings back hardness and slick surface, seating die is made with the chamber reamer, best to start with conventional 338 Win Mag dies

 

[shorthair1]

What you have described is the old 338 KT much loved by Elmer Kieth in the 60's.