TM GBBP chrono readings anti joul creep

Heavier BBs take longer to accelerate / reach their peak velocity (inside the barrel) so a short barrel like inside a pistol will see little to no joule creep. The longer the inner barrel, the more time the gas has to expand and accelerate the BB.

 
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Yeah JC needs long barrels to effectively apply. Handguns aren't really affected.

 
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