I agree that it is a quickie check but only a quickie check. Accuracy loss is determined by the amount of gas escaping around the bullet when it escapes the barrel, when the gas escapes evenly from around the base of the bullet then you should have good accuracy. When gas escapes enevenly due to muzzle damage from dropping the gun, cleaning, battlefield conditions or just soldier (this aint my weapon) use then accuracy is doomed to suffer. A round bullet won't tell you wear marks or dents at the muzzle end, just muzzle erosion. You can place a loaded round into the muzzle end of a gun and have 3/8s'' or more stick out but it really isn't telling you the whole story. Look at the muzzle carefully.A quickie check on the muzzle would involve inserting a loaded round into the muzzle. If the bullet sinks in up to the case mouth, wear is excessive. If it stops 1/8 to 1/4" from the case mouth, wear is probably tolerable. Since a Springfield was normally cleaned from the breech, wear at the muzzle may not mean as much as on a Garand.