MPBR with 110 Barnes for deer hunting?

[Taylor300]

Chronoed the 110 tac-tx out of my 10.5 bolt gun today. 2215 was the average. If I understand MPBR correctly, I can zero at 50 yards and I should be within an inch from 35 - 115 yards. Does that sound correct? Probably wouldn’t need to shoot anything past 100, so the 50 yard zero with that round should be crosshairs and shoot?

[dellet]

You’re thinking is correct, but you might think about moving your zero out to around 75-80 yards and compare the numbers. It just moves the arc some and you might prefer one over the other.

[BlogSarge]

You can play around on here…. https://jbmballistics.com/cgi-bin/jbmtraj_simp-5.1.cgi ……. and see different arcs.

In the end, don’t over think it. Choose a workable zero distance and put the venison in the freezer!

[Taylor300]

Thanks for the help!

[dellet]

One of the things to remember when doing this is to include you average group size.

If you shoot a 2” group at 100 yards, you almost have to add a portion of that to your 1” arc. The example would be your 50 yard “0” would vary +/- 1/2” at 50 and hit 1” low at 100.

So a shot 1/2” high at 50 yards would be basically 0 at 115 yards, and a shot 1/2” low would be almost 2” low at 115 yards.

It’s not a deal breaker by any means, but explains why results on paper don’t quite match results on target. It’s easy to see if you adjust your zero height +/- and see what’s the bullet moves during its flight.

Luckily at 100 yards, it’s not much of a change.

[BJK]

I read an article 50+ years ago that is somewhat on subject. It discussed folks with large groups at distance being able to hit a target when someone able to shoot smaller groups could be unable to. Same come ups in both cases, just the wrong come ups. OK, it would be a lucky shot but the person with the large group could theoretically be able to hit the target by chance where the better shot might miss every time due to the tighter group. This is not an argument for lousy shooting.