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OP
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Just to be on the same track here, what is the standard way to measure a group? Assuming its the nice triangle of three shots, what method do you all use? Measure the distance from the furthest out bullet to the line between the other two or measure between bullet to bullet and average or what? For comparison sake while developing loads, i kind of want something that is an honest representation and repeatable to quantify the good from the bad on loads. And as a side note, anyone have a good reason why some loads print two stacked and there is always a flier an inch or two out? Some loads do it, some dont?
Salmonhead
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Measure the distance to the outside edges for the furthest two shots, and then subtract the bullet diameter.
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Salmonhead
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Joined: Jun 2004
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,884 Likes: 10 |
Measure the distance to the outside edges for the furthest two shots, and then subtract the bullet diameter. This method usually underestimates the group size a bit.
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Joined: Oct 2002
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Campfire Oracle
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Campfire Oracle
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"Dear Lord, save me from Your followers"
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Joined: Dec 2014
Posts: 245
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Mathman, I would agree if you measure to the outside of the actual hole. I measure to the outside of the carbon ring, which I think approximates the outside edge of where the bullet passed through the target.
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Joined: Aug 2010
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Aug 2010
Posts: 48,179 Likes: 19 |
I try to stick with the basics, they do so well. Nothing fancy mind you, just plain jane will get it done with style. You want to see an animal drop right now? Shoot him in the ear hole. BSA MAGA
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Joined: Jun 2004
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Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,884 Likes: 10 |
Mathman, I would agree if you measure to the outside of the actual hole. I measure to the outside of the carbon ring, which I think approximates the outside edge of where the bullet passed through the target. The smudge usually isn't big enough either.
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Joined: Nov 2005
Posts: 2,540
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Campfire Regular
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For groups over about a half of an inch I find it easier and quick to determine which two holes are the furthest apart, then measure from the outside edge of one to the inside edge of the other.
With one ragged hole the measure of the widest part, minus the bullet diameter is about the only good way to do it. I don't have to worry about many of those, though.
Nifty-250
"If you don't know where you're going, you may wind up somewhere else". Yogi Berra
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Campfire Outfitter
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Campfire Outfitter
Joined: Jan 2010
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Obey lawful commands. Video interactions. Hold bad cops accountable. Problem solved.
~Molɔ̀ːn Labé Skýla~
Member #547 Join date 3/09/2001
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Campfire Outfitter
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Campfire Outfitter
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I use an app called On Target, available for free. The app has a list of bullet diameters. Scan the target, choose the diameter bullet, center the target circle (circle of bullet diameter size) on each bullet hole and read the size of the group on the Rt side in inches or MOA. Works very easily. It's possible to even keep a record of all scanned targets. It also computes distance to center of group and other vital stats. You can also input the POA and it will compute the vertical and horizontal distance of the group center from the POA.
I acquired it for free a couple of years ago, but haven't checked recently for availability, upgrades or cost.
Ed
A person who asks a question is a fool for 5 minutes the person who never asks is a fool forever.
The worst slaves are those that put the chains on themselves.
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Joined: Jan 2013
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Campfire Regular
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Campfire Regular
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Range Buddy is another free app available. A quick demo it seemed to work fairly well.
Worth a look
-Matt
"The proof of the whisky is in the drinking, the proof of the rifle is in the shooting."
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On target is now shareware. 15 days usage for free, 11.99 to keep using it. They also added TDS program for 34.99. https://ontargetshooting.com/
Swifty
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Ed
A person who asks a question is a fool for 5 minutes the person who never asks is a fool forever.
The worst slaves are those that put the chains on themselves.
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Joined: Jun 2009
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I just purchased OnTarget Precision Calculator v2.25 last night for $11.99 (the free version v1.10 is no longer available). You get a 15 day trial and it works pretty slick. It's a bargain at $12. I love shooting, but I hate measuring targets.
“There are three things all wise men fear: the sea in storm, a night with no moon, and the anger of a gentle man.” ― Patrick Rothfuss, The Wise Man's Fear
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Campfire Outfitter
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First you throw away all the targets with big groups
Patriotism (and religion) is the last refuge of a scoundrel.
Jesus: "Take heed that no man deceive you."
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Campfire Outfitter
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First you throw away all the targets with big groups I keep a record of all loads/groups sizes along with wind and temp data on a form. I don't trust my memory. But do not keep the targets.
Ed
A person who asks a question is a fool for 5 minutes the person who never asks is a fool forever.
The worst slaves are those that put the chains on themselves.
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