Hi, I had my 308W cut to 20" recrowned and threaded for a moderator. I chose the Maxim because I wanted a durable but lightweight moderator. However after approx 100 shots the muzzle looks like this.
There is no bullet strike but there seems to be gas erosion on one side of the exit hole.
Anyone have any ideas why and if it's anything to worry about. Accuracy is fine, so I most probably plan to monitor the situation and see how it goes. When the moderator is attached to the bore I always look through the barrel to check that everything is aligned.