For a 300 Yard Zero How High Shot My Placement Be @ My 100 yard Target

[samnev]

I bought a new scope (DRM II-i from Midway) for my LaRue OBR. I want to a 300 yard zero but don't know how high on my preliminary 100 yard target be before I move to 300 yards. I'm shooting 168 grain Federal GMM. Any help would be greatly appreciated.

 

[diverdon]

You might want to consider looking on the JBM Ballistics page. Imput your variables and you will see your answer. Most of us will stick with our 100 yard zero.

 

[sleeplz]

.9 mils high

 

[Ghosting]

You will be approx. 4" high at 100 yards but that could be off half an inch or so since I don't know any of the other data.
Put your data in a calculator if you know the variables.

 

[Tokay444]

Just zero at 100. Then you don’t have to worry about being high at 100.

 

[Bradv86]

Like diverdon said, plug in the bullet, mv, etc into a calculator and it will give you the answer.

Future of this thread will be telling you to zero at 100 and dial for distance, which I agree with.

 

[samnev]

Thanks guys. I will zero @ my normal 100 are zero and go from there.

 

[Baron23]

Fro targets, I zero at 100 yds. For deer hunting where I do it in the east, I like 200 as I'm pretty much point blank range out to that distance.

You can see that if I'm zeroing at 200, then on a 100 yd range, I want to be 2.2" high. I think the the advise you received to zero at 100 for targets is best. But if you wanted to zero at 300 on a 100 yd range, run this type of calc and its easy to see.

A dope card for ELD-X for 200 yd zero done on Hornady 4DOF. Now, this is pretty much just try dope, but I have validated it for elevation with my hunting rifle to 200 yds and for deer it works for me

ELD-X, 178 gr, 85 F, 50%, 200 yd zero, 2,500 fps
							WindDrift - 90 degrees
Range	V	Traj	ComeUp	5 mph	10 mph	15 mph	20 mph
(Yds)	(FPS)	(In)	(MILS)	(In)	(MILS)	(In)	(MILS)	(In)	(MILS)	(In)	(MILS)
0	2500	-1.90	0.0	0	0	0	0	0	0	0	0
50	2424	0.89	0.5	0.1	0.1	0.2	0.1	0.3	0.2	0.4	0.2
100	2348	2.21	0.6	0.3	0.1	0.7	0.2	1	0.3	1.3	0.4
150	2274	1.94	0.4	0.7	0.1	1.5	0.3	2.2	0.4	2.9	0.5
200	2201	0.00	0.0	1.3	0.2	2.6	0.4	3.9	0.5	5.2	0.7
250	2129	-3.74	-0.4	2.1	0.2	4.1	0.5	6.2	0.7	8.3	0.9
300	2058	-9.39	-0.9	3	0.3	6	0.6	9	0.8	12	1.1
350	1988	-17.09	-1.4	4.2	0.3	8.3	0.7	12.5	1	16.6	1.3
400	1920	-26.99	-1.9	5.5	0.4	11	0.8	16.5	1.1	22	1.5
450	1853	-39.25	-2.4	7.1	0.4	14.1	0.9	21.2	1.3	28.3	1.7
500	1786	-54.04	-3.0	8.9	0.5	17.7	1	26.6	1.5	35.4	2

 

[pmclaine]

Im usually adding 1.3 to 1.4 mils on my .308 with FGMM either 168/175.

But nothing is perfect......See post #11 here....

Who is Thanksgiving Shooting?

Going to take a couple hours at end of day to do some pre-Thanksgiving shooting. Brought the M40, .308 with the Leupold repro scope I have zeroed with a 2 mil hold under. Trying to decide shoot on paper for groups at 100 or go to 300 and practice my 1.4 mil hold on steel. This is as stressful...

www.snipershide.com

 

[NukeMMC]

For those of us that shot the M14 with M852/M118(pre-LR) in NM competition, we would zero at 200 and 300 was up 3moa, 500 was up 7 more (10 total) and 600 was up 13 total. When you went to shoot a 100yd reduced match, you dropped 1-1.5moa from your 200 zero. Therefore a 300 zero would be about 4-4.5moa high for 100yds. Divide by 3.44 to get mils, so about 1.1-1.3 mils high at 100.

Once upon a time, I was told by a BTDT guy that his 7.62 was zeroed at 300 and his holdovers were hold under the top of the 1 mil at 100, bottom or center at 200, on at 300, 1 mil holdover at 400, 2 at 500, 3 at 600 and 4.5 at 700.

 

[samnev]

Thanks for all the great feedback.