by smurfman on Wed Apr 01, 2020 7:32 pm
The rate of twist should be 1:16". Some individual barrels may be slightly faster, some a little slower as the machines used for rifling barrels would need occasional adjustment.
Some of the reports of "burned out" barrels are the result of the early corrosive primers and the rather harsh burning of the early powders. Poor cleaning practices exacerbated the wear process. It is a not uncommon problem with firearms up to almost WWII.