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  1. #11
    Member mausernut's Avatar
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    Just need to find a place that I can test beyond 100 yards. My own range is only capable of that.



    Although chronographing my loads and running my ballistics program has really worked out well for me with the scoped guns.

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    Senior Member Wineman's Avatar
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    Yes a longer range is always preferable to estimating at a shorter range. However, the amount of height above your POA is proportional to POI at a longer range. Is it match accuracy? No but probably "minute of deer". If your ballistic program reports a 300 yard zero, it will also give you the over/under at other ranges. There are always a large number of variables, altitude, temperature, bore condition, shooter, that will have an impact on the down range POI.

    Dave

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  5. #13
    Member mausernut's Avatar
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    The shooter is usually the biggest problem here. I got caught with one of my 303's this fall.
    My sons rifle wouldn't go off so I gave him the one I was using and grabbed the 303 that I had used last year. Had a shot at a standing deer a little over 200 yards and missed twice.

    Brought it home and shot it and bang on at 100 yards. Forgot that I had adjusted it when some new shooters came out so they could hit small plastic bottles filled with water.

    Dumb shooter.

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    Senior Member jakester's Avatar
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    Don't know what the original BC's were for the projectiles loaded into the Military M41 6.5x55, or the 7x57. However, I've found that the Hornady 140gr SP Interlock in 6.5mm, and the Hornady 139gr Sp Interlock in 7mm (both flat base projectiles), seem to regulate to the sights in each of the Mauser rifles chambered in these two calibers at 300m. This was as far as I tested as the range I shoot at maxes out at 300m. This was a long time ago, so I no longer have the load data etc.
    Last edited by jakester; 01-23-2019 at 01:49 AM.

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    Cecil, If it helps, I used a b.c. of .530 for the M41 that I have...no lot date...but it's a spitzer, slight boat tail, nickle clad (?) closely resembling physically the Old Sierra 140, even though the M41 weighs 144 gr. In my opinion, exact b.c. is not as critical as an accurate velocity from YOUR rifle. Don't try to use Hornady's new 4DOF calculator. Use an old reloading manual or one of the old online calculators, I think. Pretty good ammo, got some 9 inch 5 shot groups at 600 yards in a Carl Gustav '96 under ideal conditions, but more to your point, .530 got me awful close to the aiming point at extended ranges. Don't ask me why, possibly elevation above sea level (3500'), the M41 shot flatter than the sight graduations. Hope this helps. Flintlocke (Paul)

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