Re: Which 300 Win Mag
My first 300WM was put together this year from parts and pieces that I purchased or traded off of the Hide.
First I bought an unfired custom built barreled action - Rem SS 700LA with a Schneider 26" Heavy Varmit contour with 1/10 polygonal rifling, with threaded break. Built by Rim Country in AZ.
Then I bought a used AICS 1.5 green stock, and had the recoil lug slot opened up (wider) for the over-sized lug.
After veryfying the gun was a good shooter by using a temporary HS stock that I got with the barreled action, I sent the barreled action off to Leather Built Customs in TX to have the recoil lug ground down to fit (depth) the AICS stock lug slot, recrown the barrel, smooth out the bolt face and rim since most cases where getting caught and not ejecting (Sako extractor), and then have everything Cerikoted OD Green.
When I got the barreled action back a few weeks later, I dropped it in the AI stock, bedded a Near Mfg 25-moa rail (with loctite 409), and then mounted a Premier 5-25x56 via medium height zero-moa Near Mfg Alpha mount (double ring).
My first five round group resulted in a flyer (cold bore shot), and the remaining four rounds printed a 5/8" group. I was using Southwest Ammo 220-gr SMK which chrono'd at around 3000-fps - YES, THREE THOUSAND! Which I was suspecting because I called the folks at Schneider before buying to ask detailed questions. They told me to expect higher velocities with the polygonal rifling.
Then off to load developement. When I almost lost all hope because I felt I wasn't getting anywhere, I found a sweet load; 208-gr Amax, 75-gr of H1000, Fed 215M, and a OAL of 3.60" I'm now shooting anywhere between 0.25 and 0.50 5-round groups and the occasional flyer is me, not the rifle. I haven't had a chance to chrono the final load, but I'm guessing it's running around 2850-fps based on the loads I tried during rifle pre-testing.
Boy, I couldn't be happier. Especially when this all started, the intention was to build an Elk rifle for this Fall's third season hunt. I didn't draw a tag, but I ended up with an awesome rifle.
I'll try to post pictures when I get that part figured out.