6.5 x 300 WSM Load Data

[liv4thehunt]

I'm still in load development, but so far my best results have been with 71 grains of n570 with a 156 and Bertram 300 wsm brass. I'm getting 3100 fps on a 22" Bartlein steel barrel. This gun has an improved throat, so definitely start with a much lower charge. My coal is around 3.200. I tried adg brass and it pressured out at 3070.

 

[65WSM]

My first two reamers say 6.5-300 WSM. The second two just say 6.5 WSM. The 142 gr is a wonderful 8 twist bullet. I have several 5 shot groups I have shot with it under 4 inches at 540 yds. Reloader 26 is by far the most temperature stable with repeatable velocities. Because I am hording the last ounces of R-26 for hunting, Retumbo is my choice for group shooting. I am curious what N-565 and N-568 can do.