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Get a mold or some balls 0.020” to 0.030” undersized then use various patch thicknesses till you get an intact patch.My new .690 is shooting .662 balls with a 0.020” thick patch. As said above the math does not work. I can start these balls with the butt of a knife and they ram nicely. Patches perfectly intact. Still working up a load but hitting beer coasters at 25 yards and at 75 yards keeping them in a frisbee sized circle. Accuracy seems to fall off between 50 and 75 yards.
Get a mold or some balls 0.020” to 0.030” undersized then use various patch thicknesses till you get an intact patch.
My new .690 is shooting .662 balls with a 0.020” thick patch. As said above the math does not work. I can start these balls with the butt of a knife and they ram nicely. Patches perfectly intact. Still working up a load but hitting beer coasters at 25 yards and at 75 yards keeping them in a frisbee sized circle. Accuracy seems to fall off between 50 and 75 yards.
