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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Why are there fast bbls and slow bbls
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<blockquote data-quote="Coyboy" data-source="post: 549819" data-attributes="member: 3733"><p>I have a pro crony that is long in the tooth and thought it was giving me bad numbers, and it may have been during bad lighting shooting sesions.</p><p></p><p>So I bought an alpa crony and set them up back to back,(during good lighting conditions. The alpa read on average 35fps faster than the pro, and very consistantly at 35 fps high.</p><p></p><p>But when bullets had low ES both cronys showed it, and when they had high ES both cronys showed it. So there acraccy that way was spot on.</p><p></p><p>Low batterys and bad lighting will play hell on them the pro crony gives you terrible number spreads and the alpa just says error.</p><p></p><p>as what was said before, chamber dimensions, lot of powder, lot of barrel steel,</p><p>land and groove configuration, bore and groove dia. all these and more can have an effect on velocity, and if the conditions are stacked in favor one way or the other a considerable velocity difference can be seen.</p></blockquote><p></p>
[QUOTE="Coyboy, post: 549819, member: 3733"] I have a pro crony that is long in the tooth and thought it was giving me bad numbers, and it may have been during bad lighting shooting sesions. So I bought an alpa crony and set them up back to back,(during good lighting conditions. The alpa read on average 35fps faster than the pro, and very consistantly at 35 fps high. But when bullets had low ES both cronys showed it, and when they had high ES both cronys showed it. So there acraccy that way was spot on. Low batterys and bad lighting will play hell on them the pro crony gives you terrible number spreads and the alpa just says error. as what was said before, chamber dimensions, lot of powder, lot of barrel steel, land and groove configuration, bore and groove dia. all these and more can have an effect on velocity, and if the conditions are stacked in favor one way or the other a considerable velocity difference can be seen. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Why are there fast bbls and slow bbls
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