223 barrel. If you get 2600 fps, that's 900 ft lbs. That load still has 1800+ fps left at 200 m, so it will still expand the sp. At 1800 fps, it still has 420 ft lbs, so at 200m it still hits like a 357 Snubby does at 10 ft. Or to put it in rifle terms, it hits as "hard" at 250m as a 22 mag rimfire rifle does at 5m or as "hard" as the 25-20 does at the muzzle, or the 32-20 rifle does at 50m, or the 30 Carbine does at 100m.