Accurate load falls apart after 100

Discussion in 'Long Range Hunting & Shooting' started by Grizz1148, Jul 13, 2019.


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  1. RockyMtnMT

    RockyMtnMT Official LRH Sponsor

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    I don't want to talk you out of anything. Both of the rifles that I have had in my hands were 300rum.
     
  2. skipglo

    skipglo Well-Known Member LRH Team Member

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    Yes....yes it did....lol
     
  3. jcanning1

    jcanning1 Member

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    No expert here but... ran into an issue similar to this. Turned out to be scope parallax issue. Just an FYI.
     
  4. Grizz1148

    Grizz1148 Well-Known Member

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    I know I adjusted it and the scope is literally new. Anything can happen so I’ll be sure to check it. Thanks
     
  5. cowboy

    cowboy Well-Known Member

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    I have seen this happen where things were sub MOA at 100 and a total wreck at distance.
    My son had a rifle rebarreled by prominent gun smith and reputable barrel manufacturer.
    After repeating multiple test loads/powder/bullets different scope etc. he took it back and they bore scoped it. It had a 2" section towards end of barrel where the lands had been rolled over or flattened out. Barrel manf. didn't believe it so they had to send it in - company sent a new barrel.
    So I'd have it bore scoped - it won't cost you a dime.
     
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  6. Mt rummy

    Mt rummy Active Member

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    Yup, I would investigate this road. What you need is a water tank to capture. No anyone with a pool? Ha! You really need to examine that pill after its been extruded and that bore.
     
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  7. Joemac6324

    Joemac6324 Member

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    Unless it’s a hunting rifle, PRS rifle, whatever, you should be able to zero at 100 yds after sight in and easily fill it in with a ballistic calculator to its lethal/intended range (steel, targets, etc..) shooting out and adjusting the BC, FPS, etc...) maybe I missed something in the post, no ill will meant I assure you, but is this a hunting gun or target gun?
     
  8. Grizz1148

    Grizz1148 Well-Known Member

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    Technically I guess it’s a hunting rifle but in my eyes the issues I’m having would irritate anyone with any gun. I have a lot of experience and this is just an odd situation I’ve never ran into. I assure you and everyone else reading this that I may not be a pro competition shooter but I can hold my own and am very knowledgeable on long range shooting. Until I can test more I’m stumped on this one. For now.
     
  9. Joemac6324

    Joemac6324 Member

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    I can assure you, that I am not in any way a competitive shooter. I completely understand your frustration. I have been there also. I am only trying to help. I know something is absolutely wrong though, when your groups go wrong from a certain point and you are unable to account for it. But, technically if you can not resolve it by a recognized program, applied ballistics, etc.... time to go back to the drawing board if it technically a “hunting rifle”. Look at everything. Scope, rings, barrel, twist, etc... maybe you got a bad lot of bullets, powder, primer, brass, whatever the case may be. You stress that you are experienced. Maybe you are overthinking stuff?
     
  10. Grizz1148

    Grizz1148 Well-Known Member

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    I suppose that’s possible too. I’ve been in this game a long time so I’ve gone through all the basics before I posted this. Here’s what I know. Powder I assume is good. Shoots great in other rifles, as with the primer batch. I’m guessing it’s not bullets because it’s done it with 2 diff kinds. Brass is quality, ruling out the scope and mounts as I’ve checked them and can’t believe a loose part would allow 1/2 moa at 100 anyway. Bore was cleaned prior to that last session and is done routinely. Rifle is new as well as the glass. Twist is meant for the bullets I’m shooting. Same bags used that I shoot all my rifles from and I shoot them well. It wasn’t environmental as I shot other guns as a control. I do appreciate the input. I’ll figure this out at some point.
     
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  11. Satterlee Scott

    Satterlee Scott Well-Known Member

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    I think the rifle is just new. I don't expect too much from mine until they have 150 rounds on them.
    What scope do you have? Got a good Chronograph? If you are printing good groups at 100 but they fall apart at distance that is typically shooter error, atmospherics or ammo but you won't see ES or SD effect that until 600 maybe even further depending on the speed of the cartridge
     
  12. Grizz1148

    Grizz1148 Well-Known Member

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    I believe I found the issue. Parallax was out of alignment. I know I set it but it must’ve got moved. Thanks for all the relplies