Reply To: .25 Vulcan Gen2 barrel lands/grooves sizes

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ajshoots
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Standard .25 caliber bore dimensions are .243 land .250 groove. I know LW barrels are much large as are the korean barrels. .252 is surely in the .25 cal realm. If you are unsure, just push a bunch of pellets in and back out to measure and assure you that you have the true bore size.