My brother has a Remington 1903A3 that has been sporterized with a manlicher style stock and an 18 inch barrel, with Remington Winchester and federal factory loads it has drop in feet at 200 yards, Any ideas on how to counteract this?
The only ways a .30-06 could drop that far is if the sights were way off or if the loads were way under normal. A normal 200 yard drop below a bore sight line with a 180 grain bullet starting out at about 2350 fps MV (guess for the short barrel) would be more like 14-15". Typically, you have a scope an inch and a half above the bore axis, and you sight it to impact about two inches high at 100 yards for deer hunting. The bore sight line will then be about 3.5 inches above the 100 yard target and 7" high on a 200 yard target. At that short barrel velocity, the zero will then be at about 170 yards and it will impact about two inches low at 200 yards.
If you don't have one, ask someone using a chronograph at your range to put a few shots over it so you know what velocity he's actually getting? The drop can be figured using range tables at the back of a loading manual or on trajectory software then. The free online JBM calculators include a trajectory calculator.
My 308 carbine shoots only a couple inches low at 200 when sighted in at 100yds. A 180 grain SP bullet at 2400 fps will only be 5.7" low at 200 yds if sighted in at 100 yds. If you're dropping much more than that, then something is really wrong.
Using the Hornady Ballistics Calculator program, with their 180 grain Spire Point, and a MV of 2400 fps, it shows that a zero of 100 yards will give a drop of 5.7 inches at 200 with a scope (1.5 inches above bore), or about 6.2 inches of drop with iron sights (1 inche above bore).
However, as pointed out, we don't know many of the variables to the question, including whether or not it is sighted in for 100 yards, and what kind of groups he is getting at 100 and 200 yards.
I wouldn't immediately jump on the assumption that it was shot out. We don't even know what kind of ammunition is being used.
We need to know the size and location of the 100 yard groups to give an opinion. Perhaps you are sighted in improperly. Also, if you are jerking the trigger, that will pull your shots low, and the farther away you are, the lower they will hit.
Ballistically, the .30/06 with any load you can think of will only be inches, not feet, low at 200 if properly sighted for 100.
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