Staying under SAAMI the 65K in the 7mm Rem Mag, it took a 26 inch barrel and R26 before I could ever reach 3100fps with a 160gr. ( I used the Sierra 160 HPBT) I "chased" that 3100 several times throughout the past 40 'with 24" barrels and older powders. I realized If I wanted that ( or more!) I had to use a 26" barrel and went to , first, the 7mm STW. Even then, 3100 "with great accuracy" was 50/50. Then I was gifted a 25" 7mm RUM. Now we're cooking! ha. However, I actually settled on the 140 TTSX and its best accuracy ( 3400). I've had a few rifles that shot faster, but for the most part, their best accuracy was at a bit slower speeds. For "sure fire speed results though", get a bigger round, ha.
