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257 Roberts sight in

MN Hunter
Ladies/Gents - thinking of picking up the new model 700 in 257 Roberts.

This would be my first go at this round (looking for something the ol' lady can shoot...270wsm has too much bite)

Anywho, what/where have you guys sighted the rifle in at (ie 1" high at 100..3" high etc)

i would say the longest shot would be around 300yds (YES i know practice practice practice..)

from what ive gathered this is a very flat shooting caliber (which is ideal if i can site in X high and be dead on at 300...low at 400 etc)

ive used burris scope forever with the BR...BUT they do not have the roberts on their stickers.

im thinking of Zeiss on this one...
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Comments

10 comments

Date Votes
  • boltaction
    I sight my varmit rifles in at 1.5 inches at 100 yrd's and my hunting rifles in at 3 inches at 100 yrd's.But it depends on what load you will be shooting in that roberts and what kind of game your going to hunt.I have a 25.06 I shoot groundhogs with it's sighted in at 1.5 at 100yrd's using 90 nosler's but if I use it for deer and jump up to 120 grainer's I sight in in 3 inch high at a 100 yrd's
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  • He Dog
    I use Hornady light magnums and sight in 2.5" high at 100 yards. Puts me point blank at about 175. My limit is 250 yards. I am too old to drag a deer any further. Then again, I sight almost everything 2.5" high at 100 yerds.
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  • duckhunter
    87 grain 2 inches high at 100 yards.
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  • 2xbyu
    If you want to shoot the .257Roberts and theoretically hold dead on out to 300 yards, you have to get the bullet traveling @ about 3200fps, and that's not going to happen with a factory load.

    Ballistics Table in Yards Barnes TSX 100 gr., .370 B.C. www.hornady.com

    Range (yards)............Muzzle 50 100 200 300 400 500
    Velocity (fps)...... ....3200 3065 2933 2682 2445 2220 2007
    Energy (ft.-lb.).........2274 2085 1911 1598 1327 1094 894
    Trajectory (28 yd. zero).-1.5 1.0 2.5 2.6 -2.2 -12.9 -30.6
    Come Up in MOA -1.5 -1.9 -2.4 -1.2 0.7 3.1 5.8

    At 3200 fps the bullet would stay less than 3" high or 3" low out to 300+ yards and be 12.9" low at 400 yards.

    JMHO
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  • heavyiron
    Hi,

    There are many variables to consider in order to answer your question, so the answer is a list of estimated values.

    100 grain Hornady bullet
    0.254 BC
    velocity of 3000 fps
    24 inch barrel
    1-14 twist

    The rifle and ammunition, according to the above, would need to be sighted ~4.6 inches high at 100 yards to be at zero at 300 yards.

    However, if you zeroed your wife's rifle for 100 yards the point blank range would be ~269 yards which is probably good enough for killing deer.

    The only way to know for certain is to go to a 300 yard range and zero it in.

    Hope this helped.

    Heavyiron
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  • MN Hunter
    thanks everyone!!!


    as usual....exactly what i was looking for!
    scott
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  • sandwarrior
    MN Hunter,

    I'll take you to the range here and you can see for yourself what you may want to zero it at. How's that?

    I have three .257's and you can get whatever factory load or we could duplicate factory.

    BTW that is an outstanding caliber. Very good choice for her and you may taking a liking to it, yourself.
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  • MN Hunter
    deal...

    where do you shoot at?
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  • JustC
    with sandwarrior's generous offer I will add this....

    3" high at 100yds is pretty much where you sight in a rifle for point blank 300yd hits. Since your's isn't a magnum,..then try 3.5" high at 100yds. You can then just hold in the middle of the deer at 300yds, and drop the hammer,.....done deal.

    When I first started my education in long range shooting, the hardest lesson for me to learn was NOT second guessing the trajectory. I shot over deer all the time at 300-400yds because, in my head, the instinct was to aim high,..but with a 7mm mag sighted 4" high at 100yds,...I was "point blank" at those ranges. Once I learned to aim dead on, I was dropping them consistently.
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  • sandwarrior
    MN Hunter,

    Dakota County gun club just South of Rosemount. the only day we can't shoot is Sunday. Peace and quiet time for the township of Empire. I'll PM you with my phone # and we can set a time. Talk to ya soon.
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