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Got myslef an ION, bought new barrel for it (Freak) and went to test it in the yard, almost all my shots where all over the place and not really grouping..i was told it could be due to cheap paintball (used marballizer) which arent that cheap..any clue why this happens?

Did you size the bore to the paint? Pressure set right on the reg? Holding it nice and still?

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What's your FPS set at? Could be shooting hot...

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Yeah Marbalizer is not cheap paint.

Re: ???
 

first to say save a rock throw an Ion? haha jk, though, I'd just say make sure the paint matches the barrel well