This has been a topic of discussion since guys started to play around with their toys. There are a lot of variables in checking your velocity loss in regard to only your gun. The only way to really check is to have a 28" barrel, shoot it for group and chrono. Then, in increments of 1" only, you cut off the barrel til it's a nubbin. Remember, you're shooting everytime you cut the barrel.

Now, when comparing apples to oranges, one make with a 22' barrel may have a tighter chamber than the 24" or 25". That 22"'er will come up with higher velocities or may just match the longer barrels. Conversely, you can have tight chambers in the longer barrels and pat yourself on the back everytime you reload and chrono the load because of the chamber. Like I said, it all depends.

Damn that made me much more fatigued than normal.