I am running AR2209 in my .260 but i have a 26" barrel. I suspect you will have to use the likes of R17 or better yet Hybrid 100V to get close to 2800 with the 140gr projectiles in a 22" barrel.
My 130gr bergers are running at about 3050fps but the accurate load for the 139gr Scenars was at 2850fps (i could have run them about 100fps faster but the groups opened up a little). Both with 2209.
I assume you are running the Lapua .260 brass. I am running the Lapua small primer pocket .308 brass to allow for higher pressures.
Bookmarks