How to measure my groups?

[dc.fireman]

I have a simple question, when it comes to measuring my group sizes:

When examining a particular group for accuracy, which measurement should I be looking at (I'm using On-Target, to determine my measurements)?

Is it the Max. spread? Or the average CTC (Center to Center)?

 

[BigN]

Many people measure their groups in many ways. I take a shot group, measure center to center of the furthest two apart, and that's the outer size of the shot group. Some average, some draw a square and measure that way. If you have three shots, two are 1/2" apart but one is 3/4 inch from the furthest one, 3/4" is your shot group size.

 

[dc.fireman]

Thanks!

 

[esheato]

I measure outside to outside, then subtract the bullet diameter giving me CTC size.

You could always use OnTarget software too.

 

[Walkalong]

I take a shot group, measure center to center of the furthest two apart, and that's the outer size of the shot group

I measure outside to outside, then subtract the bullet diameter giving me CTC size.

Either way gives you the same thing, and is the correct way to measure group size.

 

[Fatelvis]

I measure outside to outside of my bullet holes and subtract 3X the bullet diameter. I seem to get better groups that way....

 

[dc.fireman]

I measure outside to outside, then subtract the bullet diameter giving me CTC size.

You could always use OnTarget software too.

Thanks, thats what I'm using.

 

[jcwit]

I make a 3 shot group, measure the center to center of the 2 closest and thats my group size. Man alive do I ever get some fantastic groups using this method.

Also when fishing I have a special tape measure to measure even the smallest fish.

 

[gamestalker]

I use a yard stick to measure my groups. It faster than having to mark a ruler end to end, and more accurate. There is a big difference between 35.43" groups and 34.98" groups.

 

[ConcernedCitizen]

I don't measure my groups, I just count the number of shots that actually hit the target...

Some days I shoot 3 shot groups, other days I shoot 5 shot groups...