Example: Measure barrel length with a dial or digital caliber with a minimum accuracy of +/-0.001 inch. Semi-auto barrels are measure from the breach face to the longest point on the muzzle end of the barrel with action closed. Revolver are measured in a simlar maner but from the face of the cylinder to the further point on the muzzle end of the barrel (cylinder may be turned to facilitate puting the caliper depth rod on cylinder face). Measurements will be made to the third decimal point then round off to the second decimal point using standar rounding rules. (ie 4.105 = 4.11 and 4.104 = 4.10) Barrel must be 4.10 or less.





Don't you just love it when the smuggly presented examples are wrong?

Last Edited By: freeidaho Feb 17 15 1:48 PM. Edited 1 times.