Lightening Grooves

[Richard Flanders]

Easiest way to measure this would be to take a syringe with a thin liquid in it, level the receiver as best you can then fill a groove to as level as you can visually then look and see how many CC's it took... You'll get the volume very close that way

[C grade]

OK, I had Bred B. upgrade an O grade 1 frame underlever 12ga to a 7 lb A grade . We did continuous lightning cuts and it reduced the weight by .8 oz. There are a lot of variables ,width, depth. end taper etc.
David

That is the gun at the left