ThomasT
Member
I've been told that many times and on paper it makes sense. But although I can only guess, I think it has something to do with the weight of the revolver and how it affects recoil. If it were simply a matter of the time a given bullet spends in a barrel, then there would be a huge difference in POI's of my .38 loads vs. .357 loads in the same revolver, but there isn't. But the .357 is quite a bit heavier than the .45 Colt, therefore the muzzle rises significantly less.
Again, just a hypothesis.
You are correct. The weight of the gun also affects how much the barrel rises during recoil. Thats the purpose of full length lugs under barrels like seen on a 686 or a GP-100. More barrel weight. Less barrel rise. Look at a fixed sight 32 long or 22lr and the barrel tangent is less because there is almost no barrel rise. Ross Seyfried made that point when he tested a Ruger Single Six Bisley in 32 mag with the drift adjustable rear sight. He stated even with its non adjustable elevation rear sight and different bullet weights there was almost no difference in POI between the bullet weights because of the very low recoil of the round.