Jayplace
Gold $$ Contributor
I have always used my calipers and measured the largest distance from outside edge to outside edge of the group and subtracted the bullet diameter to determine my group size.
I was reading a posting the other day and they subtracted a smaller number for their group. Specifically they used .290 for a 30 caliber.
Did I misunderstand their posting or is that standard practice?
I was reading a posting the other day and they subtracted a smaller number for their group. Specifically they used .290 for a 30 caliber.
Did I misunderstand their posting or is that standard practice?