What does/is a bore up kit do??

[cetane]

Originally Posted by lurkingknight

that's a pretty huge joule creep swing... I'm not sure if you can get that much difference.

Maybe not but still gonna try. Potentially could with like a 250mm but would prefer with a 363-400mm barrel. I have a g&g lower with 2 uppers so I could go that route too to fine tune it more. Just need time and some more full cylinders to tinker with

[ThunderCactus]

Longer barrels will result in more joule creep, gives the round more time behind pressure to accelerate