Pistol grouping

Discussion in 'Ammunition & Reloading' started by elfmdl, Jun 16, 2013.

  1. elfmdl

    elfmdl New Member

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    I loaded my first batch of .45 acp the other day, when I went to test shoot them I shot from a rest at 50 feet, there were 2 very tight 4 shot clusters about 6 inches apart. Do you guys think that my handloads need a little tweaking or do you think it's the handgun?
     
  2. Gatoragn

    Gatoragn Active Member

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    I think you just need to keep shooting.
     

  3. SSGN_Doc

    SSGN_Doc Well-Known Member

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    Could be mechanical, if the sight shifted or your point if aim shifted. Check your components too. Did you sort brass by brand? Trim your brass all to one length? Different thickness of brass or different lengths can change the crimp pressure. Also different case volumes can affect pressure of the load and then velocity, which would result in different points if impact. You were shooting from a bench with a rest or sandbags right? You do need to take human error out if the equation as well.
     
  4. aandabooks

    aandabooks New Member

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    What gun are you shooting them out of? That will make some difference if that is acceptable accuracy or not. I would keep shooting and tweak a little bit on each group of ammo you make up.
     
  5. elfmdl

    elfmdl New Member

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    Shot from my ruger commander sr1911.
    All the brass was the same brand and trimmed to the same length, all the powder charges were weighed, and the OAL was all the same
     
  6. DrumJunkie

    DrumJunkie New Member

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    I'd look at my mechanics first. But 6" at that distance is a littler wide for me.
     
  7. SSGN_Doc

    SSGN_Doc Well-Known Member

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    Hmm. That at least rules out those variables.
     
  8. nitestalker

    nitestalker New Member

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    A small change in sight alignment with a short barreled firearm produces exaggerated results. You would need to fire a number of strings concentrating on your sights and grip. Firing only a few rounds with an unfamiliar handgun does not offer an answer.:)
     
  9. elfmdl

    elfmdl New Member

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    Another question
    I was loading bullets without a cannelure, would you guys still run it through crimp?
     
  10. aandabooks

    aandabooks New Member

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    I only taper crimp my .45 loads. Very light crimp and none of the plated bullets I load have a cannelure. The crimp is really just to turn in the flare that was put on earlier and lightly hold the bullet.
     
  11. mseric

    mseric New Member

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    45 ACP bullet should not have a cannelure, but they should still be crimped.

    As aa stated, a light taper crimp is used to remove the flare plus maybe a thou more. You do not crimp the case mouth into the bullet, you just remove the flare.

    You fired 8 rounds. Did you fire 4 consecutive rounds into one of your "tight clusters" , then fire another 4 consecutive rounds into the other "tight cluster"? Or did you fire 8 rounds at the target and had two separate "clusters" from random shots?
     
  12. elfmdl

    elfmdl New Member

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    8 rounds 2 random clusters
     
  13. aandabooks

    aandabooks New Member

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    I like to fire a mag worth at each target. 8 rounds is not enough. When you've shot around 100 and are still getting inconsistant results then start playing with you're powder. What are you running you're OAL at? I like to seat mine so that they just fit in the mag with maybe .01-.02" to spare. I find that they run more consistantly.
     
  14. spottedpony

    spottedpony New Member

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    If the groups are one above the other, its probably one of two things, breaking your wrist up if one group is substantially higher than the aiming point (assuming a proper sighting in). If one group is substantially lower than the aiming point, you could be breaking your wrist down, drooping your head down, or pushing the whole gun forward as you squeeze the trigger.

    At a 25 yd target, 1/10" inch error in sight picture will result in a 2 to 3 inch error at the target with a handgun having a 6" sight radius. Thus if you are not aligning the sights exactly the same way every time, along with all the other fundimentals, the result can be as you discribe.
     
  15. elfmdl

    elfmdl New Member

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    oal 1.260"
     
  16. aandabooks

    aandabooks New Member

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    That's what I run my 230gr RN at. They just barely fit in the mag and run up the feed ramp nicely.