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The 308 at 1000 yards??

S

Sniper260

Sergeant
Full Member
Minuteman
Feb 22, 2013
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Simple question, I ask because I do not own a 308, but I am looking at getting one in a Sako 85 Varminter. I will probably do a custom build 308 one day too, but the reason I want the 308 in the sako is to have the grand slam in sako varminter models. Then I will have all three...

I'm stuck with regular scope bases and rings where I cant put a "canted" base on these rifles to grab a few more mils of elevation.


Question is ... How many mils does it take to get the 308 out to a 1000-1200 yards?
 
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I have 10.8 mils. Not sure about the pst, but my 5-20 super sniper will get there with out a canted base.
 
I'm a noob, so forgive me if my math is wrong, but to my understanding....

JBM Calculator tells me I have 345 inches drop at 1k with 175 SMK's. 1 Mil @ 1k is 36 inches. 345"/ 36''= 9.58 MIL. Look at the specs on whichever model scope you are looking at, and see how much adjustment range it has.

By the way my Vortex Viper 6.5-20x44 PA has a 19.8 MIL total range. Even if reticle was dead center thats a one way adjustment of about 9.9 MIL, just barely enough for the drops on my calculation. Lets not forget though, with a MIL-Dot, Hash or whatever other ranging reticule, we can use the marks just like clicks on the scope.
 
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I forgot to add I want to run 180 gr bullets... the gf distracted me...
 
Assuming you are running Sierra Match King 175s around 2650fps, you will need around 10.7-11.2 mils or so. Depends on altitude, temperature, etc. But that will get you near the target. You really need to know the muzzle velocity and the exact round with proper G7 ballistic data though.

1200 yards is really pushing .308, but I've done it with decent success just for kicks. I wouldn't rely on it. Just know that bullet is dropping so fast that the slightest error in yardage estimation will make for a miss at that range. Plus the wind is killer. Also the bullet is almost always transonic at that point so it could become unstable.

I think running 180s [MENTION=11910]280[/MENTION]0fps is too fast. BTW. You will be beating up your gear and cause reliability issues in inclement weather running that hot of a load. However, a lot of people are running Berger 185 juggernauts at reasonable speeds and the much higher ballistic coefficient makes it a good round for extended range and better wind resistance.
 
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I'm betting that if you got 10-12 mils you should be able to stretch the legs out a ways. At least to the point to the bullets accuracy limitations. Good luck. Let us know how it does. BTW: For target stuff the 175 SMK is a good bullet for a decent price. And you can get it loaded in several great makes.
 
I use the Sierra 175 MK out of a 27 inch Shillen barrel, with a lot of rounds through it. At 200 ft. ASL using Lapua brass I get about 2780 and using Winchester I get about 2720. I use a Leopold MK4 6.5X20 with M1 dials, on a 20 minute base. Where I shoot 1000 yards, the elevation is about 1200 ft. ASL. My sight setting are 17.5 minutes @800, 22 minutes @ 900 and 26.5 minutes @ 1000 yards. They vary 1 to 1.5 minutes, according to the conditions. At first I used a 16 power Super Sniper and my sight setting were very similar. I have used the .308 with the Leopold for 4 years, just changing last year. The biggest problem that I found was that after 900 yards the bullet was going over the trees and the wind would be different and very hard to read. We get hard winds off from a glacier, coming down the river. I could almost always get good scores at 800 and 900, but 1000 would drop me down 10 points unless the wind died down and then the scores would be the same. Good luck.

Forgot to add that my zero is 200 yards.
 
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That's totally pushing it... Better get a .260REM if you plan on shooting extreme long range. .308 comfort zone is more like 800 yards but that's just my $.2
 
Yesterday my dope was 12.1 mils @1030 yards. 20" with 178 Amax's 2535fps. @2500 ft elev.
 
Last I shot to 1k, I was looking at 11 mil elevation and 2 mil windage to hit the target. This is with 175SMK at approximately 3500 feet elevation and 100 yard zero from a factory 20" barrel. Winds were 25 mph gusting 30 at 15-20 degrees relative to the rifle at the shooter.

Target was a hay bale.
 
With 155 berger hybrid targets, running around 3,020 fps ive shot 6" plates at a grand. The problem with this is the 30 cal round is a sailboat and I was somewhere around 1.75 mil hold on the wind and 8.9 mils elevation. With the 308 it is doable but there are better choices out there like the 6.5's (260rem). Even though the 3,020 fps muzzle velosity of my 308 load is out running my 260 out of the barrel the flight time to 1000 is less with the 260 which means that the enviornment will have less time to affect the round. Off the top of my head i'm thinking that you would be somewhere around the 800 yard mark for consistant target engagements with the 180s.
 
I'm confused, isn't 1000 yard F-Class strictly 308? I didn't understand the OP as "Can I shoot 1000 yards with 308". What I read was "How much elevation will it take to shoot a 308 to 1000 yards?"
 
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F T/R is 308 or 223. F-Open is any cal less than .35 (i think).

I got 10.2mils with SWA 175smk out of a 26" TRG.
 
ducks-and-bucks said:
Simple question, I ask because I do not own a 308, but I am looking at getting one in a Sako 85 Varminter. I will probably do a custom build 308 one day too, but the reason I want the 308 in the sako is to have the grand slam in sako varminter models. Then I will have all three...

I'm stuck with regular scope bases and rings where I cant put a "canted" base on these rifles to grab a few more mils of elevation.


Question is ... How many mils does it take to get the 308 out to a 1000-1200 yards?
Click to expand...

This is 1000 meters (1093 yards)
My 16 inch Sig 716 with 168 gr GMM - 14.1 mils
my 24 inch Savage FCP with 175 gr GMM - 11.5 mils
Same savage with 168s - 12.6 Mils
Usually gets me within a couple clicks of the steel depending on weather conditions and wind.
 
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