Is A Throat Gage Also Used to Check Muzzle Wear?

[Kirk]

Stone Axe Engineering made combination Throat erosion & Muzzle Wear gauges that were rifle-specific. The one shown is for a Garand; one for a 1903 was different. The gauges would check MW (rings go from 0-8) on any 30 cal rifle but MW only for the rifle they were designed for. Unfortunately, SAE no longer makes these.