group size measuring

savage223 said:
If you're just shooting targets for fun, just make sure you measure the same way so you know if things are getting better or worse. And if you're really worried about fractions of an inch, well, find a longer range so the hole size becomes less important. :)

Steve
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Steve...

your not one of those one hole or under 1/2" all day long Savage shooters are you?:D
 
noneck180 said:
Yeah..okay..:confused:

we just said you subtract the hole diameter...not the caliber diameter.. how would you measure a one hole group then?? C to C of the hole?
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I will add Short Range Benchrest Shooters will always have a single bullet hole some where on their sighter target so it gives a reference for the scorer when measuring and Benchrest scorers use a tool designed for measuring hole to hole centers. Small one holers are difficult to measure. The world record small group was measured "0" at the range and later with some kind microscope measuring light through a hole was determined to be a .009" group.

Precision shooters usually don't shoot extremely small one hole groups at longer distance.
 
guntech said:
I will add Short Range Benchrest Shooters will always have a single bullet hole some where on their sighter target so it gives a reference for the scorer when measuring and Benchrest scorers use a tool designed for measuring hole to hole centers. Small one holers are difficult to measure. The world record small group was measured "0" at the range and later with some kind microscope measuring light through a hole was determined to be a .009" group.

Precision shooters usually don't shoot extremely small one hole groups at longer distance.
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I agree
 
duke1 said:
Thanks! http://www.6mmbr.com/ontargetsoftware.html

Very interesting software (free) and relatively easy to use.

Instructions are included with it and will work with a printer equipped with scanning capabilities including the HP 2175, etc. Did a quick run on a simulated target (scanned) and came up with very good results. I did not try a photo of a target but presume it works just as well.

Duke1
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A example from an actual target with the following details:

(this was sighting in a scope from a boresighter setting)

Range: 100 yd
Caliber: 300 WM
Shots: 2 (shot holes backed up with red paper to make them better visible)

Max=maximum spread
ATC=average to center of group

testse.jpg
 
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noneck180 said:
Steve...

your not one of those one hole or under 1/2" all day long Savage shooters are you?:D
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Well it always starts off with one hole until I take another shot. :)

Did a little target shooting this morning, it was a little breezy but managed a best group of 1/3 MOA, average was about 3/4 MOA, worst just over 1 MOA for 5 rnds @ 300m. Guess I'll need to get a match barrel to get those magical one hole 5 rnd groups!

Steve
 
savage223 said:
Well it always starts off with one hole until I take another shot. :)

Did a little target shooting this morning, it was a little breezy but managed a best group of 1/3 MOA, average was about 3/4 MOA, worst just over 1 MOA for 5 rnds @ 300m. Guess I'll need to get a match barrel to get those magical one hole 5 rnd groups!

Steve
Click to expand...

You are an honest man..I applaud you.
 
duke1 said:
A example from an actual target with the following details:

(this was sighting in a scope from a boresighter setting)

Range: 100 yd
Caliber: 300 WM
Shots: 2 (shot holes backed up with red paper to make them better visible)

Max=maximum spread
ATC=average to center (reference assigned by me-center of target)


testse.jpg
Click to expand...

If I have to use that contraption to measure my groups I will quit shooting..I use a bingo dabber for a target..and one old cheap sandbag..so I am little behind in the group measuring programs...or whatever that is.
 
I'm not a competitive shooter so I measure groups for my own interest. I use digital calipers and measure center to center. How do I know I've got the caliper points exactly on center? I don't, I just eyeball them. Maybe I'm out by .020" but close enough for my purposes.
 
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