Great work Riku. I seldom shoot my converted .257 as I don’t shoot paper much these days but have been focusing on hunting. I’ll return to it one day and hope to make better power for heavier and better BC bullets. The most accurate I have right now is the 257338 bullet . I just need to push it faster and the way my rifle is set up right now , I’m tapped out at about 720fps. I’m gonna blame it on flow as I don’t have any other excuses.
Smaller stem pays two benefits, less closing force, and increased flow through the throat area.... Looks like you nailed it!....Bob
A bit of random testing, 200 bar and normal bullets shoot at 300 m/s, bullets with blue PC shoot at 304 m/s -> 12 fps difference.
Quote from: rkr on January 10, 2022, 04:23:26 AMA bit of random testing, 200 bar and normal bullets shoot at 300 m/s, bullets with blue PC shoot at 304 m/s -> 12 fps difference.What lube and same sizing die used? Marko
The FPE is pretty much proportional to the pressure, as it should be.... Nice job!....Bob