Most of the books talk about standard size circles distances and shot percentages. That’s fine but I use the same practical test for all my guns
12 inch circle drawn on a sheet of cardboard, black marker 3 inch disk in the center. Full test I shoot it at 10 20 30 40 & 50 yards. Most times use 20 30 & 40. Changing paper Shoot each multiple times to weed out poor point of impact shots. Back home eyeball each I get a good idea of gun and loads performance on targets I am likely to shoot.
Lot of shots in a full test. Two barrels 3-5 distances more than one load and multiple shots to confirm sure POI. 20 shots or more. Have a 12 inch plywood disk with 3 inch center cut out, fast job to make up a target. Won’t give percentages to compare with standards but gives a real idea of my gun and loads performance.
William
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