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 Drop at 300 yards from 100 yd sight in, for .308
1stID  [Member]
8/26/2010 2:34:26 PM EST
I'm taking my Rem 700 out on the 300 yard range tomorrow.

I have it sighted in at 100 yards, with Federal 150 gr Nosler BT's. 20" bbl rifle.

What's a quick and dirty guess/estimation for bullet drop at 300? I'd like to dial in decent right from the start, and not waste ammo.

Thanks,
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Dan_Gray  [Team Member]
8/26/2010 2:38:55 PM EST
You'll still be on paper. No more than a couple of inches.
reelserious  [Team Member]
8/26/2010 2:45:27 PM EST
14 inches or 4.5 moa.
neilage66  [Member]
8/26/2010 3:10:45 PM EST
16" barrel with 147 grain at 2500 fps is 18.5 inches low at 300 using 100 yard zero.

You asked for quick and dirty...just figured some *come ups* today.
1stID  [Member]
8/26/2010 3:27:17 PM EST
It's 14-18 inches low at 300 with a 100 yard zero? Wow. I've not done any precsion work at that range, and I'd thought it would be a lot less. Shows what I know.

Would a 200 yard zero be a happy medium between 100 and 300 yard targets? Maybe a couple of inches high at 100 (but still a dead target) and then a lot less drop at 300?

Thanks,
neilage66  [Member]
8/26/2010 3:30:38 PM EST
This may be of relevant interest to you OP:

http://www.handloads.com/calc/
1stID  [Member]
8/26/2010 3:41:47 PM EST
Awesome. Many thanks.
reelserious  [Team Member]
8/26/2010 3:50:58 PM EST
Once you know your velocity you can go to jbcalculation and figure it out. I shoot a similar load and the 150 grainer will probably go more like 2700 fps from your gun for a 14 inch drop per my first post.
cowboy7242001  [Team Member]
8/26/2010 4:14:48 PM EST
Originally Posted By 1stID:
It's 14-18 inches low at 300 with a 100 yard zero? Wow. I've not done any precsion work at that range, and I'd thought it would be a lot less. Shows what I know.

Would a 200 yard zero be a happy medium between 100 and 300 yard targets? Maybe a couple of inches high at 100 (but still a dead target) and then a lot less drop at 300?

Thanks,


If you have a mildot scope, the first dot down will be pretty close at 300 with a 100 yard zero.

WIth a 200 yard zero, you would be roughly 2" high at 100, but you would still be ~8" low at 300.
Dan_Gray  [Team Member]
8/26/2010 9:16:08 PM EST
I'm going back to school :(

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Rob01  [Moderator]
8/27/2010 3:44:38 AM EST
Originally Posted By 1stID:
It's 14-18 inches low at 300 with a 100 yard zero? Wow. I've not done any precsion work at that range, and I'd thought it would be a lot less. Shows what I know.

Would a 200 yard zero be a happy medium between 100 and 300 yard targets? Maybe a couple of inches high at 100 (but still a dead target) and then a lot less drop at 300?

Thanks,


It would be better to keep the 100 yard zero and learn how to run your scope and the data for your rifle. A 200 yard zero won't help anything as then you will have to dial up and down. Stick with a 100 yard zero and dial up 4.5 MOA or 1.1 mils and you should be real close.
benjio  [Member]
8/27/2010 6:54:11 AM EST
Why is it that most of the online calculators and exbal end up with so much less bullet drop than the "ballistic" app on my iphone? Same data entered on all of them. It's pretty irritating; I don't know what to believe.
frankiebagadonuts  [Member]
8/27/2010 7:05:22 AM EST
Originally Posted By benjio:
Why is it that most of the online calculators and exbal end up with so much less bullet drop than the "ballistic" app on my iphone? Same data entered on all of them. It's pretty irritating; I don't know what to believe.


Are all of the variables (i.e. elevation, temperature, etc) the same?
RDTCU  [Team Member]
8/27/2010 7:09:57 AM EST
All my larger rifles are zeroed at 200... Except the RFB with the Eotech, it's zeroed at 100...

My .308 target rifle has an ART IV scope on it, and the drop compensation starts at 200 and goes to 500. this would be useless with a 100yd zero...
LoneWolfUSMC  [Member]
8/27/2010 7:21:49 AM EST
Originally Posted By benjio:
Why is it that most of the online calculators and exbal end up with so much less bullet drop than the "ballistic" app on my iphone? Same data entered on all of them. It's pretty irritating; I don't know what to believe.


Garbage in, garbage out.

Pay attention to the little things. They can make a difference.

HOWEVER all that really matters is what your rifle shoots, not what a computer says it should.

In my experience Ballistic FTE has been pretty close. My 700 likes to shoot a little higher than FTE calculates, but it may be my chronograph isn't as accurate as I would like.
50-140  [Team Member]
8/30/2010 6:11:15 AM EST
There are a lot of factors involved in your ballistic trajectory.

The load I'm using, 155.5 Berger traveling at 2846 fps at 60' elevation, 60 degrees, sighted in at 100 yds, drops 13.3 inches or 1.2 mils at 300 yds.

That's out of a 26" barrel Sako TRG 22. That data was determined with an Oehler 35, and range work.
RugRat  [Member]
8/30/2010 7:31:02 AM EST
Yeah, I get about 15 inches of drop from muzzle when sighted at 100 yards.

So, 5 moa of *additional* elevation (you say you're sighted at 100, but you didn't say you were zeroed at 100).
RoverG79  [Team Member]
9/5/2010 8:25:54 PM EST
I have the best answer for you. Shoot and find out.
SteelonSteel  [Team Member]
9/6/2010 5:53:19 AM EST
I was going to say the same thing, just shoot it.

Later plug the drop into a ballistic program and it'll give you the estimated velocity in your rifle.

Really you could have your V down cold and run the numbers in a great program but YOU STILL REALLY DON'T KNOW SHIT WITHOUT TESTING AND RANGE PRACTICE.
slappomatt  [Team Member]
9/6/2010 6:41:48 AM EST
according to the Remington ballistic tables for most of their ammo they say about 7-10" not sure of the barrel length and other factors but I beleive they usually go with a 24-26" barrel.
shrapmagnet  [Member]
9/8/2010 5:32:22 AM EST
With my 20" 700 using 175 gr it is approx. 18", 0r 5 MOA low. This translates to 1.6 MOA. This is with ambient air temp @ approx 80 degrees F. at sea level with high humidity (NC sandhills area) Out to 300 the elevation drop should be similar for 168 or 150, but group size and location (zero shift) would obviously be different. Also note at the same conditions, with the same ammo, similar rifles will have differences in muzzle velocities, which will affect everything.
guns762  [Team Member]
9/8/2010 12:09:05 PM EST
Originally Posted By 1stID:
It's 14-18 inches low at 300 with a 100 yard zero? Wow. I've not done any precision work at that range, and I'd thought it would be a lot less. Shows what I know.

Would a 200 yard zero be a happy medium between 100 and 300 yard targets? Maybe a couple of inches high at 100 (but still a dead target) and then a lot less drop at 300?

Thanks,


A lot of hunters us a "hunting zero", better known to us as a Battle zero of 3-4" high at 100= about 3-4" low at 300yrds. If that is what you are after for hunting, it is not a bad way to go, as it's hold dead on at anything up to 300. Your impact will be with in the kill zone of the deer. It's not precision, but it works well for that type of application.
RoverG79  [Team Member]
9/8/2010 6:42:11 PM EST
Originally Posted By guns762:
Originally Posted By 1stID:
It's 14-18 inches low at 300 with a 100 yard zero? Wow. I've not done any precision work at that range, and I'd thought it would be a lot less. Shows what I know.

Would a 200 yard zero be a happy medium between 100 and 300 yard targets? Maybe a couple of inches high at 100 (but still a dead target) and then a lot less drop at 300?

Thanks,


A lot of hunters us a "hunting zero", better known to us as a Battle zero of 3-4" high at 100= about 3-4" low at 300yrds. If that is what you are after for hunting, it is not a bad way to go, as it's hold dead on at anything up to 300. Your impact will be with in the kill zone of the deer. It's not precision, but it works well for that type of application.


but alas this is the precision forum.
guns762  [Team Member]
9/9/2010 3:54:31 AM EST
Originally Posted By RoverG79:
Originally Posted By guns762:
Originally Posted By 1stID:
It's 14-18 inches low at 300 with a 100 yard zero? Wow. I've not done any precision work at that range, and I'd thought it would be a lot less. Shows what I know.

Would a 200 yard zero be a happy medium between 100 and 300 yard targets? Maybe a couple of inches high at 100 (but still a dead target) and then a lot less drop at 300?

Thanks,


A lot of hunters us a "hunting zero", better known to us as a Battle zero of 3-4" high at 100= about 3-4" low at 300yrds. If that is what you are after for hunting, it is not a bad way to go, as it's hold dead on at anything up to 300. Your impact will be with in the kill zone of the deer. It's not precision, but it works well for that type of application.


but alas this is the precision forum.


Thus, my comment that is wasn't. From the OP's question, I'm not so sure that is what he is after; more just to get on paper for his first time shooting past 100yrds.
RoverG79  [Team Member]
9/9/2010 5:16:02 AM EST
Originally Posted By guns762:
Originally Posted By RoverG79:
Originally Posted By guns762:
Originally Posted By 1stID:
It's 14-18 inches low at 300 with a 100 yard zero? Wow. I've not done any precision work at that range, and I'd thought it would be a lot less. Shows what I know.

Would a 200 yard zero be a happy medium between 100 and 300 yard targets? Maybe a couple of inches high at 100 (but still a dead target) and then a lot less drop at 300?

Thanks,


A lot of hunters us a "hunting zero", better known to us as a Battle zero of 3-4" high at 100= about 3-4" low at 300yrds. If that is what you are after for hunting, it is not a bad way to go, as it's hold dead on at anything up to 300. Your impact will be with in the kill zone of the deer. It's not precision, but it works well for that type of application.


but alas this is the precision forum.




Thus, my comment that is wasn't. From the OP's question, I'm not so sure that is what he is after; more just to get on paper for his first time shooting past 100yrds.


I know, I am just messing around. Like I said earlier, the guy just needs to find a place, shoot, and record the data.
guns762  [Team Member]
9/9/2010 5:20:03 AM EST
Originally Posted By RoverG79:
Originally Posted By guns762:
Originally Posted By RoverG79:
Originally Posted By guns762:
Originally Posted By 1stID:
It's 14-18 inches low at 300 with a 100 yard zero? Wow. I've not done any precision work at that range, and I'd thought it would be a lot less. Shows what I know.

Would a 200 yard zero be a happy medium between 100 and 300 yard targets? Maybe a couple of inches high at 100 (but still a dead target) and then a lot less drop at 300?

Thanks,


A lot of hunters us a "hunting zero", better known to us as a Battle zero of 3-4" high at 100= about 3-4" low at 300yrds. If that is what you are after for hunting, it is not a bad way to go, as it's hold dead on at anything up to 300. Your impact will be with in the kill zone of the deer. It's not precision, but it works well for that type of application.


but alas this is the precision forum.


Thus, my comment that is wasn't. From the OP's question, I'm not so sure that is what he is after; more just to get on paper for his first time shooting past 100yrds.


I know, I am just messing around. Like I said earlier, the guy just needs to find a place, shoot, and record the data.



Sorry, my sarcasm meter is done broke in the technical forums....everyone is always so serious.

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