Worked up a load for my T3 Tikka 300 Win Mag with a stainless steel light weight hunting barrel. The rifle also has a muzzle brake. After doing some preliminary ladder testing, (we don't do ours exactly like the article on this website recomends, we are developing long range hunting ammunition, were happy with .75 moa) we found that H4831 SC at 73 grains with CCI No. 200 Large Rifle Primers, Winchester Nickel plated brass topped off with a 178 grain HNDY-AMAX, was definately getting us the accuracy that we wanted out to 500 Yards. Are range isn't further than 500 Yards so we can't shoot past that. However the only issue we have with this load is that it vairies as much as 150 FPS. Now we were restrained by time so we were trying to get done, so maybe the scorching hot barrel had something to do with it, but then again maybe not. Every bullet was seated at .50 of an inch off the lands, and all of the cases had been neck turned and trimmed to .001 of an inch. At 500 Yds 72-74 grains of powder ( in half grain increments 5- Shots total) all hit in a 3.5 vertical by 1.5 horizontal group. At 500 it obviously won't make a difference, but when we want to shoot 700-1000Yds, I think it will. Any thoughts or ideas?????