.243 sighted dead on @100yards

i just finished sighting in my .243 to be dead on at 100yards with rem corelockt 100grain.

my question is: given the 100yard zero, will the bullet drop much at 200yards?

i was told that i should be able to aim at the top of the spine and drop a deer out to 300 yards with my zero.

( most of my shooting is at 100yards and under and i would rather hold over than hold under)

any help would be great.

 

Remington ballistics at:

http://www.remington.com/pages/news-and-resources/ballistics.aspx

They don't show anything closer than a 150 yard zero but that puts you within less than an inch at all closer ranges.

 

I just sighted in my new Savage 14 AC in 243 and this is what I did. I checked the numbers and found that with the 100 gr. bullet using either the Federal or Winchester rounds needed to be 1.7-1.8" high at 100 to be dead on at 200. I'm sure the Remington would be pretty much the same.
This comes out to 3.3" low at 200 when sighted at 100.

 

My .243 has a 100/200 yd zero.

 

How does one get a zero at 2 different distances without twisting some dials or having a ranging scope?

 

Butcherboy, do you know anyone with a chronograph, or can you shoot at a 200 yard range?

 

Just really depends on your ammo. You really just need to shoot it and see where it hits. I shot my rifle at 100 yards and at 150 yards testing this. With re loads it was hitting in the bulls eye. At 150 yards it was hitting very close to the same spot. The rounds still were hitting the bulls eye. However, with Federal Power Shok the rounds were about 1" low at 100 yards, but at 150 yards they were about 3.5" low and about 2" to the right. This was very repeatable. I'm not sure what made them go to the right at 150 yards when they were dead center at 100 yards, but they did for some reason. This just shows how different ammo in different guns can always shoot differently and there is no way to tell where yours will shoot without checking it at the further ranges.

 

tim the student: i dont have a chronograph, but have the land to setup a 200yard range.
i was planning to shoot and test at 200 yards and just adjust as needed. like i said i do alot of close range shooting and i personally find hold under harder than hold over.

 

I doubt that will work, but you need to know (among other things) velocity, bullet weight, bullet ballistic coefficient, sight height above the bore, etc., to figure that out. Or a 300 yd range.

 

There's nothing like real world testing with your own gun, but for what it's worth my 243 with 95 gr. Hornady SST's with 100 yard zero is roughly 4" low at 200. If I'm going to be shooting further than that, I take other equipment. Not that it wont do the job, just isn't my favorite for that kind of work.

 

"How does one get a zero at 2 different distances without twisting some dials or having a ranging scope?"

Lot of guys dnt like it. But i use see threw scope rings on my Mohawk 600.
In side 50 to 100 yards ,iron sights.
Past that much i shift to my Ednar 3x9x32 Its zeroed at 175 yrd

 

sight in 2 inches high at 100yds good out to 250yds no hold over

 

Because bullets cross the line of sight at two ranges, and I just happened to get lucky that mine does so (or close enough) at 100 and 200 yds.

 

butcherboy,

I have watched a fellow I know drop coyotes from 50 to 250 yds with a 6mm which is very similar to your 243. He sights in close to 1.25 high at 200 yards. Like I said, field proven for sure. I think the suggestion earlier for 2" high at 100 yds is pretty spot on too.
Now if you want to get exotic you can do what another friend of mine did. That is you could turn and chamber your own 22-284 barrel 27" long, and hold dead on to 350 yds. On coyotes he would use the top of the ears for correct hold over at 400 yds.

 

Thanks for starting this thread it made me look at the balistics that I thought I knew. I now understand why I missed a deer last year.

 

Sight in 2-2.5" high at 100 yards, which will get you pretty close to maximum point blank range for any standard centerfire rifle cartridges. You can pretty much just point and shoot without any holdover or holdunder until you get beyond 300 yards.

 

243 Win, 100gr PSP

100 YARD ZERO
Range Drop Velocity Energy
0 -1.5 2960 1945
25 -0.72 2892 1857
50 -0.2 2826 1773
75 0.04 2760 1692
100 0 2696 1613
125 -0.34 2632 1538
150 -0.99 2569 1465
175 -1.96 2507 1396
200 -3.28 2446 1328
225 -4.96 2386 1264
250 -7.03 2326 1202
275 -9.51 2268 1142
300 -12.43 2210 1085
325 -15.78 2153 1030
350 -19.6 2097 977
375 -23.87 2042 926
400 -28.73 1988 877
425 -33.96 1933 830
450 -39.86 1881 785
475 -46.45 1829 743
500 -53.74 1779 702

200 YARD ZERO
0 -1.5 2960 1945
25 -0.31 2892 1857
50 0.62 2826 1773
75 1.27 2760 1692
100 1.64 2696 1613
125 1.71 2632 1538
150 1.47 2569 1465
175 0.91 2507 1396
200 0 2446 1328
225 -1.27 2386 1264
250 -2.93 2326 1202
275 -5 2268 1142
300 -7.5 2210 1085
325 -10.45 2153 1030
350 -13.85 2097 977
375 -17.72 2042 926
400 -22.16 1988 877
425 -26.98 1933 830
450 -32.47 1881 785
475 -38.65 1829 743
500 -45.53 1779 702

 

Mine is 1.5 inches high at 100yds.