Home Forums Hunting & Shooting Handguns velocity change w/ change in b/c gap?

Is there any rule of thumb regarding the increase in velocity as the barrel/cylinder gap is reduced? I would imagine that the velocity increase per 0.001� bc reduction would vary depending on whether it was from 0.008� to 0.007� or from 0.003� to 0.002� since the reduction from 0.003� to 0.002� is a greater percentage reduction than that same 0.001� increment at the larger bc gap. I have a Ruger Bisley 45 Colt and it has 0.008� gap and I am getting 1200 fps from a hard cast 335 grain bullet. What would the velocity likely be if the bc gap was reduced to 0.003�? Thanks, Rufous.

Rufous,
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<br>I read an article once on this very subject. Unfortunately, I can't remember the statistics.
<br>It seems to me that the author found the variations in velocity inconsequential if within factory specs.
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<br>In other words the gain isn't worth the pain.
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<br>Norm