Originally Posted by freedummy
Related, I want to hear about REALLY short barrels! For instance, has anyone tried shooting through an iFit/Python sizer without a barrel? Is it even possible to achieve usable velocity by underboring at that length? The closest test cases I've heard are all from the Goblin launchers, but I think their finicky valve system is skewing any info I find.
I rememer when those hamerhead barrel kits came out. They argued the ball only needs about 1.5 inches to reach velocity when the diameter is matched correctly. Then again, they also claim rifling helps a lot, and I'm not convinced on that part, so maybe they're just full of BS.
Short answer is I've never heard of anyone using a stand alone super short sizer like the python ones, so I don't know.