There's bound to be an optimum pellet weight for each setup but the only way to tell is by testing. We're only talking about marginal differences though so unless you have a wind tunnel and some expensive kit ... We used to have the same conversation with Crossbow shooting. You could get away with light bolts for indoor shooting but everyone used heavy bolts outdoors. You don't need fletchings on them either but you had to have them due to the rules. Large fletchings over compensate though so I've seen bolts hit left on a target in a left to right wind. It's confusing to newbies. If you're going to try them keep notes and give them a fair trial, not just a couple of weeks. We used to do quite a bit of bench testing with crossbows to remove the human element.
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