A dial indicator or digital bore micrometer is the only way to go. It may read 'cylinder' at the muzzle with a graduated drop-in gauge but the bore could widen several thousandths behind the muzzles for a few inches.
Counting pellet holes and doing the math to get percentages is tedious.
The only times I shoot at paper is to find POI and to determine what shot size gives the best patterns with a particular gun.
.
__________________
"I'm a Setter man.
Not because I think they're better than the other breeds,
but because I'm a romantic - stuck on tradition - and to me, a Setter just "belongs" in the grouse picture."
George King, "That's Ruff", 2010 - a timeless classic.
|