But, FrakenMauser, that SP101 barrel is not 3", it's 3 1/16". Aguila Blanca sees it - the question is still, "Why that extra 1/16 inch?" Does that fraction add to the ballistic performance? Remember, too, that the SP101 had a 3 1/16" barrel in .357 long before the gun was offered in other calibers. I have one of those, and I do get that the longer barrel, compared to the 2 1/4", makes a better platform for .357. That still doesn't clarify why they added 1/16".
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