JB Bore Bright (2oz) Quantity:2oz You can measure wall thickness

You can measure wall thickness both before and after the neck has been turned

after resizing

Or for the flush bench mounting situation a slightly different base plate which is called QC Flush Mount Base Plate

for superb color contrast correction and high resolution

JB Bore Bright (2oz) Quantity:2oz You can measure wall thicknessA micro fine bore cleaning and finishing compound that works as both a cleaner and a final polish to help keep barrels free of fouling and shooting their absolute best. Regular use gives your barrel a mirror like finish that helps prevent the build up of accuracy robbing copper fouling, plus greatly reduces cleaning effort. Clean your barrel as you normally would, then after cleaning with J B Compound, follow with J B Bore Bright to achieve a super