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Do Barrels Pick Up Speed?

In Blog by Rich2 Comments

Do barrels pick up speed? It’s a concern to many in the precision shooting sports though it isn’t talked about as widely as I’d have thought. This topic should be of particular interest to hand loaders since it could affect their load development and result in wasted powder, bullets, primers, etc. The idea here is that a brand new barrel, if chronographed with it’s first rounds out of the tube, will see a speed increase as the barrel “breaks in.” I’ve got some data to support this, both anecdotal and hard numbers. However, I did make an error when I set out to really try and confirm this in the manner I planned. Do barrels pick up speed? Read on to find out!