Accuracy help at 600

Discussion in 'Long Range Hunting & Shooting' started by Wrcassell21, Aug 22, 2012.

  1. Wrcassell21

    Wrcassell21 Well-Known Member

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    I am shooting a savage model 10 FCP in 308, 1:10 twist 24", 178 amax grouping 1/4" at 100 and like crap at 600 "well over ", I'm using 178 amax, 45.5 varget, and 2.815 oal, when max chamber is 2.825. love the speed (2720 ) but would like 1/2 moa better. think I'm shooting too fast ? any suggestions
     
  2. Broz

    Broz Well-Known Member

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  3. WildRose

    WildRose Well-Known Member

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    Ditto to Boz's suggestion.

    More often than not it's going to be a shooter induced error of some type when your having your groups open up that much.

    Is your rig free floated and bedded?

    Are you shooting from the same position when going long vs the 100yds groups?

    What scope are you shooting? Is it parallax adjustable and are you adjusting it properly for the long shots?

    A sub MOA rifle and load should remain sub MOA between 100-600yds without any problem.

    Last question, how much time is transpiring between shots at 100 and 600yds and are you letting it cool down completely after finishing at 100 before starting on the 600yds target.
     
  4. lrdevil

    lrdevil Active Member

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    Assuming that you're doing your part right in terms of shooting and also your reloading, maybe try backing off a couple grains and work your way back up in .5 grain increments to find minimal vertical spread, thats usually worked good for me at those ranges. Also, check your scope mount because my shooting buddy had similar problems and was so frustrated and when we check out his rifle it turned out that his base was a little loose.
     
  5. RMulhern

    RMulhern Well-Known Member

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    Run a 'ladder' test!
     
  6. Wrcassell21

    Wrcassell21 Well-Known Member

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    I'm shooting from concrete slab and lead sled, using vortex viper pst , adjusting parallax, with warne steel rings and steel 20 moa base, guess will check base tightness and do ladder
     
  7. JeffP40

    JeffP40 Well-Known Member

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    How many 1/4" groups have you shot at 100? If it isn't most, then it isn't a real 1/4" load. If it is, then the advice you have been given is spot on. A ladder test at distance, (600 is good), will give you a better idea of what is going on.
     
  8. Wrcassell21

    Wrcassell21 Well-Known Member

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    I shoot consistent 1/4 groups til barrel is dirty, regarding parallax my scope has increments to 500 then infinity, I focused til my eyes were best at 6, should I have rather put it on infinity than focus til my vision was best since there was no 600 mark on adjustment knob?
     
  9. Broz

    Broz Well-Known Member

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    Parallax and focus are two different things. I think it would be worth your while to search up some of the threads here to help you to understand parallax and the affects it will have on your point of aim. This is surely a part of your problem but I do not believe it is all of it.

    Jeff
     
  10. Len Backus

    Len Backus Administrator Staff Member

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    For explaining how to adjust for parallax I use the term "bobble head test" to describe the process.
     
  11. Wrcassell21

    Wrcassell21 Well-Known Member

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    @ Len, can u further explain or shoot a link?
     
  12. Len Backus

    Len Backus Administrator Staff Member

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    I wrote the following explaination last year for TAC 15 crossbow users. It all applies to rifle scopes obviously too. Just envision much longer shooting distances.

     
  13. Wrcassell21

    Wrcassell21 Well-Known Member

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    just read an article parallax vs focus and I just learned a lot I did not know, I did not adjust correctly and just estimated where about 600 would be and pulled trigger. I am new to long range shooting and do most hunting inside 300, it sounds that correct parallax adjustments are greatly important. will give this a try and let u guys know results, thanks will
     
  14. apache sniper

    apache sniper Active Member

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    For what it's worth, here are my suggestions. It is true that parallax makes a hell ofa difference however, no adjustment is dead on I have found so here are things you can do to eliminate other potential problems.

    First. How is your cheek weld? is it the same everytime? At 100 you can be slightly off your weld and still shoot 1/4 MOA at longer ranges you can't. If you are shooting for instance 1500 to 2000 yards the weld alone will make the difference between a hit and a miss.

    Second. How is your trigger control and weld is it consistent? When I was competing in long range I used a pumice stone on my trigger finger precisely where it welds to the trigger. This can also make a huge difference

    Third. Are you squeezing off your shots between heart beats? If not discipline yourself to do that and work on breath control particularly diaphragmatic breathing it will help your rifle to move the least if you breath that way.

    Best O luck I hope this helps Good Shooting
    Apache Sniper