Originally posted by smoke63b
I don't worry about measuring accuracy until the velocity is consistent. For velocity, mags don't seem to care too much. Timmies don't like a tight fit since it can slow down the strike on the poppet. My dinky pump cocker does best with a tight fit for velocity and roll-out; with a loose fit on cheap paint it's not worth playing with.
That's really the reason I even have a barrel kit. Sometimes the paint has gone to hell and a kit is all you have to compensate. Other than that, I would probably have a .689 on every marker. That's always been one of my favorite mag features, to be able to throw a party mix of ugly paint scraps in the hopper and play reliably.


which is lovely to start with.
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