zero at 200 but not shooting the same at longer distances.

Discussion in 'Long Range Hunting & Shooting' started by freebird63, Oct 30, 2011.

  1. freebird63

    freebird63 Well-Known Member

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    I have a stupid question to ask, I have only got to shoot my 280AI a few times, but have come up with a great load out to 200 yards, tried 400 & 600 yards today. The scope that is on my rifle is a sightron S3 6-24X50 with mil-dot reticle. I am shooting 162gr A-Max bullets, the last time out I shot 4 shots at 200 yards and a quarter would have covered all 4 shots. So when shooting the extended distances should a person re-adjust their scope or take a mental note and where your hitting, say at 400 yards the first dot down from the cross hair its shooting low and to the left, make a mental note of that or adjust for it????
    I will also tell you I am not impressed with the sightron scope for longer distances, but can't afford anything else. Thank you for any advice.
     
  2. WildRose

    WildRose Well-Known Member

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    Chuck your bullet is falling to the ground at the speed of gravity fom the moment it leaves the muzzle.

    If you are zeroed at 200 that zero is good only for 200yds.

    I plugged this into Hornady's ballistic calculator to give you and example.

    200yds zero, Amax 162, 3000fps.

    100yds=+1.4"

    200yds=0

    300yds=-6.1

    400yds=-17.6

    500yds=-34.9

    1000yds=-240.4"

    To compensate for the drops you either hold over the target they appropriate amount, or you adjust the elevation on your scope to match. If your scope adjustment is a true 1/4 MOA per click, then you come up 4 clicks per MOA of adjustment needed. Again using the same calculations.

    Come up

    100yds=-1.3(hold low about 1.3")

    200yds=+/-0 (hold dead on)

    300yds= up +2.0 MOA or 8 clicks

    400yds= up +4.2MOA or 18 clicks

    and on and on out to 1000yds where your come up is 23.0 MOA or 92 clicks.

    Now if your elevation turrett is a target or tactical turrett that shows MOA it's really simple.

    If you don't have those types of turrets then the best advice is to practice noting how many dots you elevate on your mil dot reticle for each hundred yard increment.
     
    Last edited: Oct 31, 2011

  3. freebird63

    freebird63 Well-Known Member

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    Thank you wildrose, my scope has the stock factory turrets and right off hand I can''t remember if its 1/8 or 1/4 moa per click.
    I am still not sure if it was the right choice to switch from 140gr accubonds to the 162gr A-Max, one thing I know is those A-Max bullets sure do fly, but then with that high of BC what do you expect. Please feel free to share any other info you have. Thanks again. Chuck
     
  4. WildRose

    WildRose Well-Known Member

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    Both are excellent bullets but the AMax is strictly a target/varmint bullet where the accubond is a teriffic hunting bullet.

    If you intend on hunting anything other than predators/varmints and like the hornady bullets look at the interlock and interbonds as they will perform much better on game.

    Just remember all bullets travel in an arc rather than a stright line like a laser.

    For their price point the SIII's are very good scopes. I had an original sightron from their first year of manufacture that never once failed me and always held zero. It was on it's fifth rifle when I sold the rifle and scope to my best buddy and he swears it's the best scope he's ever owned.
     
  5. freebird63

    freebird63 Well-Known Member

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    I plan on hunting mule deer and possibly elk and antelope. What about the 162gr SST hornady bullet. A friend uses those in his 300RUM, 30 cal bullets of course. I have hear different stories about the A-Maxes for big game. Was hoping to try some 168gr bergers, but I can't see going out and buying a whole box and then finding out my gun does not like them. Plus I can't afford a box of them right now.
    A guy on another forum was suppose to send me 10 berger 168gr bullets to try but they never made it here.. Always appreciate any advice. Thank you again. Chuck
     
  6. WildRose

    WildRose Well-Known Member

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    The interlock and interbond are both great bullets with very high BC's. Hornady states plainly on their site that the Amax is not intended as a hunting bullet.

    For the best of both worlds it's very hard to beat the interbond, Swift Scirocco (my personal favorite) and the Accubond.

    As for the Berger there's guys who swear they are the best thing since sliced bread, but in reality they are just a hollow point BT with a very good BC and thus not something I'm going to use on game. Varmints/predators? Sure, but not game animals. I like at least 85% weight retention and a complete pass through no matter whether it's a perfect shot through the ribs or through both shoulders and I don't want to be able to stick my fist into the exit hole. I see no point in wasting that much meat.
     
  7. steelshooter

    steelshooter Well-Known Member

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    I also have a new Sightron SSIII 6-24x50 moa scope. I am very impressed with it and prefer it over my zeiss conquest and Leupold mk4 8.5- 25. On days with little mirage I can see 20 cal bullet holes at 500m (546yds). Don't loose faith in that scope just yet.
     
  8. liltank

    liltank Well-Known Member

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    The A-max's will do well (yes Rose, I know it is a match bullet). It is heavier and takes a lot more to get the big one's to open up. It will react about like a Berger. They do have a lower opening speed than a Berger, so that is a bonus also. But since the A-max and SST have the same BC, either will work. It's been my experience with the 208 A-max that it can take a licking and keep doing its job.

    Tank
     
  9. freebird63

    freebird63 Well-Known Member

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    Steelshooter, I use to have the scope on my 300RUM and couldn't see any holes at 400 yards "30cal", unless I used one of those splat targets, but it was still hard to see. These were days with no mirage. I was really hoping for a little better performance from it.
     
  10. yobuck

    yobuck Well-Known Member

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    chuck youve got a good gun, a good scope, and good bullets.
    go shoot something.
     
  11. freebird63

    freebird63 Well-Known Member

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    Deer season ends today-i never did make it out-maybe next year
     
  12. WildRose

    WildRose Well-Known Member

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    Getting them to open up is most certainly not a problem at pretty much any velocity.

    I just hate that massive hole they make on the way out IF they exit.

    With better choices out there I just can't see using a thin jacketed match hollow point on game.
     
  13. D.Camilleri

    D.Camilleri Well-Known Member

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    I also have a sightron SIII but in a 8-32. I really like the scope and it is very clear. Sightrons customer service is excellent, if yours isn't clear, send it back to them, I am sure they will send you another. My SIII is clearer than a brand new Leu 6.5-20 VXIII. Both are nice, but I like the sightron better.
     
  14. freebird63

    freebird63 Well-Known Member

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    D.Cam, how far away can you see the holes in your targets?? If I use one of those splat targets I can see my holes "300RUM" at 400 yards barely.
    Now I have the scope on my 280AI and the holes are even smaller and harder to see.