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Stupid Question

B_McB_Mc Member Posts: 794 ✭✭✭✭
edited January 2008 in Ask the Experts
OK, stupid question: What does the abbreviation mean that I see
with various gun sale descriptions, something like this-’S
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Comments

  • B_McB_Mc Member Posts: 794 ✭✭✭✭
    edited November -1
    MOA?? please explain as if i were 5 years old.
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  • B_McB_Mc Member Posts: 794 ✭✭✭✭
    edited November -1
    I was wondering....why are some topics locked? and others not? what does that mean....???

    Thanks..from the new guy
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  • B_McB_Mc Member Posts: 794 ✭✭✭✭
    edited November -1
    if sending co2 pellet/bb gun through mail, does it have to go through an ffl? ive sold and sent a few firearms, never an airgun. i wouldn't think you'd have to, but you never know these days as under some definitions, these could be "firearms" thanks!
    ps-its going to cali if that matters!
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  • B_McB_Mc Member Posts: 794 ✭✭✭✭
    edited November -1
    I'm fairly new into firearms, and keep hearing references to the AR 15. I know that several manufacturers make this rifle (or clones of) and have been trying to find some information on them. I keep seeing AR 50, or M15 in the bushmaster website for instance, but no information on the ar 15. Can anyone point me to a good place to get information for this rifle and also what the differences are.Please pardon my ignorance, and thanks in advance.Alex
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  • HandgunHTR52HandgunHTR52 Member Posts: 2,735
    edited November -1
    Here is a pretty good thread about it from the Competetion and Reloading forum. It explains it pretty well.

    http://forums.gunbroker.com/topic.asp?TOPIC_ID=275299
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  • rufe-snowrufe-snow Member Posts: 18,650 ✭✭✭
    edited November -1
    GOOGLE, "minute of angle".
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  • laxcoachlaxcoach Member Posts: 1,296 ✭✭✭✭✭
    edited November -1
    1 MOA = 1" off center at 100 yds, 2 MOA= 2" off center at 100 yds, etc.
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  • Tailgunner1954Tailgunner1954 Member Posts: 7,734 ✭✭
    edited November -1
    1 MOA is equil to 1/60th of a degree (360 deg to a circle).
    In shooting terms, this is a angle that's equil to 1.047" @ 100yd, 3.141" @ 300yd etc).
    A 1 MOA group is one that measures 1.047" from center to center of the 2 holes that are furtherst apart (center to center = outside to outside minus 1 bullet diameter = inside to inside plus 1 bullet diameter. 3 ways to get the same result)
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  • sandwarriorsandwarrior Member Posts: 5,453 ✭✭✭
    edited November -1
    B_Mc

    The forumla for MOA is this: 1 (degree) divided by 60(minutes)= .01677777
    Then take the sine (sin on your calculator) and that = .000290888R
    Multiply that by 3600(inches in 100 yds) and that = 1.047R

    If you will note what you have done here is found the rise (1.047") by using the runs(3600) ratio to the base angle (.016777 degrees)

    it will look like this in formula (1/60)sin x3600=1.047"

    p.s. Welcome to the forum. And no that isn't a stupid question. A lot of folks know that an MOA is an inch per 100 yds roughly but how do you get it? Thats the best answer I can give you.
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  • B_McB_Mc Member Posts: 794 ✭✭✭✭
    edited November -1
    Thank you all for clearing that up.

    What are you talking about ice racer????
    Why dont you explain this situation to me then.

    In your previous post you said "Thus "One Minute Of Angle" is equal to 1 inch at 100 yards." and now you say that it should fall in a 2" circle please elaborate!!!
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  • iceracerxiceracerx Member Posts: 8,860 ✭✭✭
    edited November -1
    All you math whiz' that are trying to build accuracy from the result shown on your calculator aren't taking into consideration what the least accurate numerical value you are working with is. "One Degree" has a accuracy of ONE place. 60 minutes only has an accuracy of ONE place. 100 yards also has an accuracy of ONE. When you use any of those numbers in an equation, your level of accuracy can be NO MORE then ONE. You CAN'T build accuracy into a calculation by adding decimals. You are only as accurate as you LEAST accurate number (thus endeth today's "math" lesson).


    Thus "One Minute Of Angle" is equal to 1 inch at 100 yards.
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  • mcasomcaso Member Posts: 1,119 ✭✭✭✭✭
    edited November -1
    What I get from these posts. If one aims dead center at a target that is 100yds away, the hole the bullet makes should be no more than 1" out of dead center. This hole can be low, high, or off to the left or right. Yes?
    mcaso
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  • iceracerxiceracerx Member Posts: 8,860 ✭✭✭
    edited November -1
    quote:Originally posted by mcaso
    What I get from these posts. If one aims dead center at a target that is 100yds away, the hole the bullet makes should be no more than 1" out of dead center. This hole can be low, high, or off to the left or right. Yes?
    mcaso


    One MOA would show your GROUP of shots falling into a 2 inch circle (from the point of aim) at 100 yards.
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  • mcasomcaso Member Posts: 1,119 ✭✭✭✭✭
    edited November -1
    Yes, Thanks iceracerx
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  • B_McB_Mc Member Posts: 794 ✭✭✭✭
    edited November -1
    I get it now. Thanks to all for making that as clear as my simmons 44mag scope.
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  • sandwarriorsandwarrior Member Posts: 5,453 ✭✭✭
    edited November -1
    iceracerx,

    Under normal hunting conditions I would agree with you, and even in LR/tactical. But seeing as how benchresters have shot .047" and better, I would say it's necessary to add for exactness. It isn't always done, mind you, but in the game of typical .1's or less you are talking half the accuracy of those very capable shooters.

    But for all intents and purposes an inch @ 100 is an MOA and that's a pretty good standard to measure yourself by.
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  • Tailgunner1954Tailgunner1954 Member Posts: 7,734 ✭✭
    edited November -1
    quote:Originally posted by iceracerx
    quote:Originally posted by mcaso
    What I get from these posts. If one aims dead center at a target that is 100yds away, the hole the bullet makes should be no more than 1" out of dead center. This hole can be low, high, or off to the left or right. Yes?
    mcaso


    One MOA would show your GROUP of shots falling into a 2 inch circle (from the point of aim) at 100 yards.


    Actually that would be WRONG. A 1 MOA group will have ALL bullets impacting within 1/2" of the center (a 1" circle). A 2" group would be a 2MOA (with all rounds hitting within 1" of center).
    Remember we are talking about the size of the group itself (diameter), not the error of the seperate shots (radius).
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