Sight adjustment...... again.......

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I'm trying to figure this out, see if you agree with this:

Marlin 1894 .44 mag 20 " barrel

Load - 240 gr XTP SP/24.0 gr 296, about 1650 fps

Zeroed @ 50 yards

I shoot 3 different loads in this gun - the one above, a 300 gr WFN/15.5 of #2400, and a 250 gr SWC/5.0 of Bullseye

I'm trying to figure out a front sight height that will allow me to shoot these w/o having to crank it up a mile over the top of the action. With the zero I presently have (240 XTP), the 300 gr should hit lower (heavy, slower bullet), and the 250 should also hit low (roughly the same weight, but REALLY slow). Right? If that is correct, then the rear sight is as low as it needs to ever be, unless I change the loads. If that's the case, I can calculate the height of the sight I need from this equation:

(amount of impact error) (sight radius) / distance to target

But am I right in assuming that the two slower bullets will hit LOW? I haven't had the chance to shoot them side by side yet, and I'm just curious if I;ve got it figured out right. (It's been a long winter....already....)

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[Chuck 100 yd]

It works differently in different guns BUT.
I find the lighter bullets at high speed will shoot lower than say a 300+ bullet at 12-1300 fps at short range due to the barrel recoiling up more before the bullet leaves the barrel.
Now at longer ranges the slow heavy bullet will start to drop quicker than the faster bullet will .
I would shoot groups with both at a large enough target to get an accurate picture of what is happening in your rifle.
Example: in my marlin cowboy .357 I usually shoot 158gr.bullets and have my rifle sighted for them using the factory front and a Williams FP rear. Now when I shoot 125gr bullets at near max,vel. they are very accurate but shoot nearly 3 ft. high at 100yd. I would have to install a higher front to get it to point of aim.
Then when shooting my 158`s my rear sight would be up so high I could not keep my cheek on the stock.
Sometimes we just cant have it all the way we would like.

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Yeah, I see whatyou mean Chuck! (sigh) I guess I'll have to wait until the weather improves and go shoot them. DANG! Spring seems like a long time off...............................


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