Wc 735
Happen to read this today on a site in Canada
WC-735 in a 308 Winchester - Range Report
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Disclaimer: The following did not blow up my rifle. It might blow yours up. It might even kill you. I suggest you use EXTREME caution in using ANY load data worked up by some guy on the Internet (me) who didn't have a pressure-test rig. I take no responsibility if any of this turns out to be unsafe in your rifle. You have been warned!
That said, as I couldn't find any information like this floating around out there, I thought I'd share. Here's what I got in my first test run.
Components: RP brass, WLRM primers, Hornady 150grain FMJBT's - shot over a chronograph. 3 shots each per load listed below.
41 grains of powder: 2720-ish FPS
42 grains of powder: 2760-ish FPS
43 grains of powder: 2840-ish FPS
44 grains of powder: 2920-ish FPS
At 41 and 42 grains, I had signs of low-ish pressure (badly smoked case necks, and primers backing out without flatening).
43 grains kept the primer in place, but still smoked the case neck pretty thoroughly.
44 grains looked pretty good - just a very wee touch of case neck smoking, primer stayed in place fine, with just a touch of primer flatening (quite a bit less flatening than I get with my Varget loads at the same velocity, actually). If it weren't for the fact that the chrony said the load was already pushing the limits of expected velocity for a 150 grain bullet in a 308 Winchester, I probably would have kept going based on what the case looked like after firing. As it is though, I think the Chrony just gave me an early warning I might be about to push things, so I'm going to take that warning and stop there.
With all loads, the accuracy was just a hair less than I am getting with my Varget loads (about an extra 0.2-ish inches). Velocity spread looked a bit ugly (+/- 40 FPS, or about an 80FPS spread), but light conditions were very