quick question about measuring groups

psdan000 · March 18, 2008, 06:52 PM

when you guys measure group size, do you measure from center to hole, to center of hole, or from center of hole to outside edge. thanks, Dan.

Art Eatman · March 18, 2008, 07:22 PM

Simplest is to measure across to the outer edges of the farthest bulletholes, and subtract one diameter.

ndking1126 · March 18, 2008, 08:11 PM

Since center to center leaves a little guess work ("Is that perfectly centered??"), I normally measure from left side to left side of the 2 bullet holes farthest apart.

hoytinak · March 18, 2008, 08:13 PM

Quote:

Simplest is to measure across to the outer edges of the farthest bulletholes, and subtract one diameter.

Yup, that's what I do to.

Bolosniper · March 19, 2008, 10:25 AM

There are three acknowledged measurement methods I'm aware of to determine group size. Maximum Spread, Average Group Radius, and String Measurement.

This is the most commonly used method.

Maximum Spread: Measure to the extreme outside edges of the furthest apart bullet holes of the group, and then subtraction the actual bullet diameter.

March 18, 2008, 06:52 PM	#1
psdan000 Senior Member Join Date: February 14, 2007 Location: Amelia, Ohio Posts: 258	quick question about measuring groups when you guys measure group size, do you measure from center to hole, to center of hole, or from center of hole to outside edge. thanks, Dan.

March 19, 2008, 10:25 AM	#5
Bolosniper Member Join Date: September 10, 2005 Location: Dillon, Montana Posts: 70	There are three acknowledged measurement methods I'm aware of to determine group size. Maximum Spread, Average Group Radius, and String Measurement. This is the most commonly used method. Maximum Spread: Measure to the extreme outside edges of the furthest apart bullet holes of the group, and then subtraction the actual bullet diameter. __________________ Mike McIntyre VP Operations MPI Rifles, LLC [URL=http://www.mpirifles.com]

March 18, 2008, 07:22 PM	#2
Art Eatman Staff in Memoriam Join Date: November 13, 1998 Location: Terlingua, TX; Thomasville, GA Posts: 24,798	Simplest is to measure across to the outer edges of the farthest bulletholes, and subtract one diameter.

March 18, 2008, 08:11 PM	#3
ndking1126 Senior Member Join Date: January 26, 2008 Location: Madison, AL Posts: 1,932	Since center to center leaves a little guess work ("Is that perfectly centered??"), I normally measure from left side to left side of the 2 bullet holes farthest apart.