W760 54r Improved Preliminary Test

After a new barrel was installed, speeds came up considerably.

24" New .311 bull barrel
W760, Sierra 150gr ProHunter, LR primer, PPU Brass 11/2013

 

46gr = 2139fps
50gr = 2452fps
51gr = 2497fps
52gr = 2569fps
54gr = 2701fps
55gr = 2756fps
56gr = 2875fps