Muzzle wear gauge
- Thread starter gunsdora
- Start date
It must be used as a comparison gauge from when the barrel is new and as it is used... it isn't measuring the grooves, it is measuring the 'bore' which can vary considerably with different makes of barrels and cut or buttoned or hammered barrels, no real useful function in the world of accurate sporting/hunting rifles.
Given how much 7.62x39 bore can vary, I can't imagine that a 0, +1, +2 type guage would be useful on the lands unless, as mentioned above, you knew where the starting point is/was. Not sure how much the muzzle would deteriorate if of the chromed variety. Military Garand held to fairly tight tolerance so things mean a bit more w/ that guage for if you're trying to determine approximately how many rounds down the pipe.
R
R
- Location
- NOVA SCOTIA, CANADA
You can use a small hole gage as used in machinist trade to measure any bore size.That being said the only thing to enter my muzzle is my elbow.
Because of the variables in the barrels I think you have to gauge the barrel when it is new to have a reference on the gauge to later show wear.
Why are you concerned about barrel wear? Has your accuracy level dropped? Often having a fresh crown cut restores some accuracy that was lost.
Not that is matters that much with your 7.62 x 39 but serious Centerfire Benchrest shooters may freshen their crown every 400 rounds or so... and I am not aware that they ever use a muzzle wear gauge. If their barrels won't shoot well under .200" they are not competitive.
I have never held one. I do have a bunch of bore gauges that were used more to detect fouling build up, around 1970 and before but I have never actually seen one used. From the #4 and issue days of TR. Accuracy wise the throat is far more important and the old question, "does it shoot?".
