I have a Savage M110 w/26" bbl. Savage used the same throat reamer as they did for the companion.300wbymag. In other words, a 0.375" freebore.
I find data closely matches published data.
My favorite loads:
200grn Sierra GameKing, 90grn RL25, ditto 200grn Nosler Part; 3,050fps (seat to 3.585")
180grn Hornady PTSPT Interlok; 100grn Retumbo, to edge of cannulure, not in. 3,350fps,
Ditto 180grn Nosler part. at 3.585" (to fit magazine- hunting, not match loads, but at, or under moa).
My most favorite however is 180grn Rem Corlokt (no longer available in components) over 105.0 grn of WC-860 for 3,300fps.
I bought bullets in '05 for 0.09 each. Powder for $5/lb. 200 Rem cases for $90. $200 for Rifle! $22 for dies, shell holders. Scope I won in pistol matches.
I don't hunt or shoot it much, but can't bring myself to sell it! Made longest shot I ever made with it in '11. 485yds measured w/laser rf. used Retumbo and 180grn Hornady SST. (Too little expansion). Just a pin hole through deer but hit spine.. DRT,
However, it draws blood on both ends. Weatherby eye every time I've shot game!! If I used it more, I'd work up a reduced load with ACC5744 (see Lee #2, or Accurate Powders fo load.. 180grn bullet, 60grn for 3,000 fps... I suggest Hornady 180grn Interlok.). But, with reduced load, I might shoot it more...
But my Colt Lt.Rifle in '06 weighs 3 lbs less and kills just as well... Guess which goes elk hunting...!