My first Encore setup was a factory 15" 243. With 58 grain V-Max handloads, it would shoot lights-out at 100 yards with minimal recoil. The issue I ran into was it wouldn't shoot heavier bullets like the 95 grain SST at 2,500 fps well, although it did fine with the 85 grain Interbond at 2,700. I don't think the standard 1-10" twist is the best option for heavy bullets with the reduced velocities.