I am waiting to find out how my rig will work in the Gunsite XLR class on October 6-9. I have a Badger Ordnance M2013 action screwed into a Bartlein 28" 5R heavy varmint barrel, metal epoxy bedded into a AICS AX stock. Glass is an semi retired S&B 5-25x56mm with 24 mil vertical adjustment, 20 moa rail, and 6mil Sphur mount. Muzzle brake is 2nd generation Fat Bastard, and the butt has a Limbsaver Magnum pad for my arthritic shoulder. 96.0 grain Retumbo, 215M primer, Lapua brass, and Hornady 285 grain HPBT match bullet. Seating is 3.050" cartridge base to ogive, single loading only. I am getting 2930 fps average for mine and my son's Remington 700 with a 30" Kreiger heavy varmint on an AICS AT stock is getting 2990 fps average for the same load. Extreme spread average of a bunch of 5 shot groups is 23 fps and Standard deviation is a bit above 8, with highs in 10's and low of 4's.
Shot a few 300 Berger, but did not have enough time to find a good load for that round yet. I was able to single load it to a bit over 2850, but need more work to get that load down.
I like the heavy set up, not able to haul it up and down any mountain, but it shoots like a 6mm Remington. Shot 60+ rounds in a day and want to do more the next day.
Marc Soulie of Spartan Precision Rifle, in San Jose, did an excellent job for us and we are shooting half inch group, when we are paying attention.