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how do you measure a group?

Buckmaster223
i cant remember the formula for measuring a group. can someone help please....

One Shot-One Kill...... SEMPER FI U.S.M.C.
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Comments

11 comments

Date Votes
  • Cyclonus
    I think that it is the average distance of your shots to the proximity of them from dead center on the target you shot at.

    Revenge is a double edged sword that only kills its wielder
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  • perry shooter
    Hello most people when shooting for group size 3 shot or 5 shot use a dial caliber to measure the distance from the edge of hole to the outside edge of the furthest other hole then subtract the bore diamenter of the bullet fired this gives the extreme spread from the center of one bullet to the center of the other bullet.
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  • Xracer
    What Perry Shooter said.

    Group size is the center-to-center distance of the two shots farthest apart.
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  • mrbruce
    A dial caliper, hummmm finally something I don't have [:D]
    Anyone have one for sale cheap ?

    Gun control is hitting what your aiming at.
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  • dcso3009
    I got mine from Cabelas for about $20. That was the cheapest new one I could find
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  • robkelly2242
    A dial caliper is cheaper from a tool supplier. Try Grizzly, IPS, etc. Cabelas is way high on their tool prices.
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  • Blckhrn
    quote:Originally posted by mrbruce
    A dial caliper, hummmm finally something I don't have [:D]
    Anyone have one for sale cheap ?

    Gun control is hitting what your aiming at.


    I'll probably get slammed for this but Harbor Freight always has one or more on sale. They just had an 8" digital caliper well under $20 (for guys whoget those "flyers"). I believe that, with good light, a good ruler, good eyes and some practice you'll get a more accurate reading with a machinist's scale.

    york.bmp"No taxation without representation"
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  • heavyiron
    Perry Shooter has it right.

    Regards,

    Heavyiron

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    "If I don't see you nomore on this world, I'll meet you on the next one, and don't be late!" - Jimi Hendrix
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  • rwfixem
    ask a machinist or gunsmith. The smallest division on a scale(ruler) that can determined with the human eye is 1/64 of an inch.
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  • sandwarrior
    If you are measuring for a competition the standard is a dial caliper that can measure 1/1000th's of an inch. If you are just practicing you can use a 6" machinists scale that goes to 1/128th's. I bring my spare from work out to the range so my dial caliper won't get banged up. 1/128 is about 7.5/1000th's of an inch, which is very visible to the human eye.

    We have the second amendment so that all the rest are secure....UNK>
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  • calamitywood
    have them stand with their backs to a door facing and mark a line at the top of their head. then measure with a standard tape measure. [:o)]
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