Sorry, just saw this.
77.6 grains of 2217 for a 5 shot average of 2984 fps and 15 ES from a 26” Bartlein barrel.
It’s chambered for 3.5” OAL, which is quite a bit longer than standard.
Barrel was fitted, chambered and fluted by Chad Dixon at longriflesinc.com when I lived in the US.
Regularly shot .5 MOA at 350 yards with 208 A-Max before I switched to ELD-M.
Cheers.
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