i ve decided to set one of my 06 up at 100 zero..the other will stay at 2 high...
funny thing it says the165grn rnd drops 4 inches if shot to 200 yrds..
it sure doesn t out of my guns..it just doesnt drop that much ..
i well remember shooting 200 yrds when it was set at 100 zero ...
sometimes i wondered if it dropped more than a inch..2 at the most..
i just thought id put this in as it makes me wonder how correct these charts are on further out..now the range had about a 10 degree slope.. but
i never thought that little amount could make that much difference..slim

The charts are handy but they really give you no more than an approximation of trajectory. Velocity may vary a good bit from one rifle to another for any given load. Sight height above bore can affect trajectory, and so can shooting up or down hill. The charts serve well in giving you some idea of how to zero your rifle for a particular load, but the only way to really know your trajectory with that load is to shoot it and see.

yep i guess we best write down our own gun, ammo, an the ballistics for them,,info..
thing is i got it all wrote down but cain t find the tablet.. i had some work done here an im thinking the dang contractor picked it up to figure something an took it home with him..thats an exspensive loss..thanks for your input. slim

Make sure you're reading the chart right. Sometimes they have multiple zeros in them. I would expect "dead on" at 100 to equal 4 inches low at 200, and 2 inches high at 100 to be dead on at 200. Almost all of my bolt-action rifles are set up exactly this way. And it really doesn't matter what chambering, for hunting cartridges in the 2800 - 3200fps range that is pretty well what you can expect inside of 200 yards.

Only thing that will really screw with that trajectory is a very high scope, or a very low sighting plane (such as iron sights).

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MikeG

If you sight-in about 2.5 inches high at 100 yards with ALL your deer rifles, here's what you'll get:

Brush cartridges will be "on" again at about 160 yards and 2.5" low at 200.

Standard cartridges will be "on" again at about 225 and 2.5" low at 260.

Magnum cartridges will be "on" again at about 250 and 2.5" low at 280.

You can run those profiles, with the appropriate velocities and BC numbers, with almost ANY popular cartridge, and not be more than a few yards off. Really. I used speeds of 2200, 2800 and 3000 fps, with BC of .250 and .350.

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Sage, Rocky...I like the way you think. We really do make things too complicated, sometimes, but you just dumbed it down perfectly! You could set up three or four baskets and sort the brass for virtually every cartridge chambered in a shoulder-mounted rifle, into the categories you listed above. Only difference would be bullet weight.

As Mike already pointed out, if you've got a high scope mount, like one of those shoot-through models with very high rings, your bullet has climbed more to get to line of sight at 100 yards, so it won't drop off as much as the tables suggested they will. Those are just for reference anyway. You can handload, chronograph, calculate your own BC, etc...until you actually SHOOT at longer ranges, you won't know what your gun/load does.

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"For my part, I prefer a sensible median between trying to shoot an animal across a township and getting close enough to ram the rifle muzzle down its throat." - Jack O'Connor

Bullet weight doesn't matter, nor does caliber. The only things that affects trajectory are velocity and BC. (Sight height has an effect on the line of sight, but not trajectory, strictly speaking.)

Blunt bullets with a BC in the low 200s and launched at 2200 fps or so all fly about the same. So do bullets with mid 300s BC and launched at 2800 or the same bullets at 3000 fps.

The exceptions are at opposite extremes of both speed and BC. A 45-70 slug with a BC of .1xx and launched at 1300 fps will be quite different from a sleek .4xx BC bullet launched at 3200. But all the COMMON bullets, launched at typical speeds, fly like identical twins.

Or as I used to teach in Hunter Ed: Sight 2.5" high; then hold on hair, never air.

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my 06 is exactly 2.5 at the 100... personally id like my other to be set at 100 zero
for the 5 dollar a shot deal but.. my scopes capuut..
but a 2 hi at the 100 my 06 just plain don t drop 4 inches at 200... i remember posting about it a good while ago..
to be honest i stepped off,, what was suppose to be 200 an it was closer to 185-190 but the drop wasn t hardly 2 inches..
one thing about it for me.. these little things matter a lot less as ammo goes up.. im not shooting for money much..
so its not important to check an recheck.. slim

Rocky- you and I are on the same game plan. For 40 years I've used that model for sightin. On my ground squirrel rifles I go 1" high at 100 just because I dont shoot much over 200 yds.

I have a real handy target I came up with to do this.

Nalgi,

You can't leave us hangin' like that...show us a picture of this target!

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"For my part, I prefer a sensible median between trying to shoot an animal across a township and getting close enough to ram the rifle muzzle down its throat." - Jack O'Connor