Accuracy issues with rifle
I shot several groups out of my 7mm RM this weekend and am having some issues. This is an older Weatherby Vanguard with wood stock. The rifle is bone stock other than a Timney I dropped in, no bedding of any kind. I shot a couple MOA groups with this rifle at 200 and 300 yards one day, but am starting to wonder if it may have been a fluke or maybe just dumb luck. I do am in no way shape or form an expert shooter, I still need lots of work in that department, but I have shot several MOA and sub MOA groups with a couple varmint rifles.
I could not get by Vanguard to shoot better than 5-6" 3 shot groups at 200 yards. I did shoot 2 groups at 100 yesterday just to see what they looked like. One was about 1.5" and the other was about 1.7". I am not waiting 5 minutes between shots, just single loading one shell at a time and taking my time, probably 1 1/2 to 2 min between shots.
I am shooting the 168gr Berger VLDs by HSM (in signature). I know Berger says that these bullets are picky about seating depth and finding your COAL sweet spot, but I have shot some groups with other ammo and get very similar results, almost identical. I was wondering how sensitive the COAL is to accuracy? I measured 3 of the HSM cartridges this morning before work, and I got 3.350", 3.346", 3.356". Is .010" quite a bit for ammo that should have been made in the same batch?
I am very interested in shooting the Bergers. I do have access to reloading equipment, but pretty much don't know anything about it. In your opinion do you think I would be better off altering the rifle for improved accuracy or handloading to try and find the COAL sweet spot? Thanks.
Weatherby Vanguard 7mm Rem Mag
Leupold VX-III CDS 4.5-14 x 40mm
HSM Trophy Gold w/ 168gr Berger VLD