12-27-2017, 02:44 AM
Ward12473 Wrote:I wish they had a 20 in. barrel. I have faxon barrel and I like it a lot but I'm just thinking in terms of accuracy JP would definitely be a step up. I guess my next question to you guys is how much distance would I be loosing by going with am 18 in. Vrs the 22in. JP barrel?
Two inches isn't much of a difference. Some people report that their 16" barrels get more velocity than their 18" barrels. Other things play a factor such as rifling twist and type. If you are talking about a 4 inch difference, you could make a pretty good "rule of thumb" estimate. One average that I read from Klem was "It will be about 25fps for each inch of barrel."
LRRPF52 also said once that "There isn't a linear rule for muzzle velocity and barrel length, but rather a curved rule. As the barrel gets past 20", the increase per inch produces less speed, although each barrel has its own characteristics."
Engineer, FFL and Pastor