Not quite as fast as H-4350 but dang sure accurate with the 142 gr. Sierras in my 260AI.
My barrel is 26 inch 1 - 7.5 Tw. Loading 47.5 gr. H-4831.What length and twist barrel are you using, for that 260AI?
It's my #1 in my 6mm AI with the 87 to 105 gr bullets. Low es&sdSeen 4831 and the sc version available at LGS for $45 and was wondering what you guys have had luck with it in. I was considering picking up some to try in .243 but seems most of the powders I use are coming around except for the price.
Exact same load except mine is a Shehane.54.7 gr in 284 Win Lapua brass with a 184 gr Berger hybrid bullet.