If you're only getting 23-2400fps you are in the Grendel class of cartridges. A 6.8 SPC was designed for 16" barrels and would give similar performance as a 16" Creed. Especially in the 120gr bullet area. A lot less in recoil, flash, noise, and powder consumption. To me it's silly to handicap a good cartridge with a short barrel. May as well shoot a smaller cartridge. I'm not judging at all. Ive got plenty of guns that don't really make sense. My Contenders come to mind.What would a Grendel do better with a shorter barrel than a creedmoor?