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Old December 10, 2019, 09:13 AM   #9
Bart B.
Senior Member
 
Join Date: February 15, 2009
Posts: 7,388
The top ranked competitive shooters using AR15 rifles in 223 rebarrel about every 3000 rounds. Ditto for benchresters shooting 22 caliber cartridges the same size as the 223 Remington.

All barrels will eventually shoot a given load's bullets a bit slower and require more sight elevation at longer ranges. Accuracy also degrades and at some point no longer meets some standards. The cause is not gas leak but instead less resistance to bullets entering the chamber throat and bullets increased jump to the throat as it erodes .001" down the barrel every few dozen shots.

Last edited by Bart B.; December 10, 2019 at 09:26 AM.
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