As I recall the FBI barrel was around .070/.071 ish range. I think someone posted it elsewhere here.
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That's the same as CRANE's 10.3". How much difference in "function" does another 1" or so of barrel make? I mean, if you had to equate a 0.065" ported 11.5 to a 10.3", what is that equivalent to?
For example "0.065" in an 11.5" is like 0.070 in a 10.3" due to less dwell." or something
I've never messed with a 12.5". But I'd estimate .063-.064" would be close. Between 10.3 and 11.5, I haven't notices a real difference in porting function. (i.e. a .068" runs very similar in both) But stretching that dwell out to a 12.5" might start making more of a difference.
Last edited by markm; 08-16-18 at 09:53.
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Last edited by Clint; 08-16-18 at 10:38.
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