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168gr .308 to 1000 & Beyond .... Anyone Doing It???

 
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Old 06-23-2012, 06:50 PM
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168gr .308 to 1000 & Beyond .... Anyone Doing It???

I'm looking to take my .308 out to 1000 (and possibly beyond). I'm shooting a Remington 700 SPS Tactical. 20 inch barrel, 1:12 twist. I'm getting sub .5 MOA from 100 out to 600 using my handloaded 168 grain AMAX. I'm using 42.7 gr of AA2520 with CCI primers. Anyway, I keep hearing "if you want to take it to 1000, you'll need to use 175 gr and higher". I know there's gotta be some people out there that are shooting 168 gr to some success. I have shoot plenty, I've just never shot a .308 past 600 yards. Part of the problem is finding an area that will support 1000 yards.

The are several reasons for me not wanting to go up in weight. The first one is twist. I don't have the 1:12 twist, so I don't think the higher weights would stabilize enough. One other reason is the amount of powder, bullets, primers .... etc that I would burn up trying to work up a load that may or may not stabilize with my current barrel. Another, is the problem with finding a good area to shoot. So, difficult to work up a round specifically for 1000 yards.

Anyway, if there are others out there using 168's with some success, I would like to hear about what your using.
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Old 06-23-2012, 08:17 PM
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Re: 168gr .308 to 1000 & Beyond .... Anyone Doing It???

Quote:
Originally Posted by Muttt View Post
I'm looking to take my .308 out to 1000 (and possibly beyond). I'm shooting a Remington 700 SPS Tactical. 20 inch barrel, 1:12 twist. I'm getting sub .5 MOA from 100 out to 600 using my handloaded 168 grain AMAX. I'm using 42.7 gr of AA2520 with CCI primers. Anyway, I keep hearing "if you want to take it to 1000, you'll need to use 175 gr and higher". I know there's gotta be some people out there that are shooting 168 gr to some success. I have shoot plenty, I've just never shot a .308 past 600 yards. Part of the problem is finding an area that will support 1000 yards.

The are several reasons for me not wanting to go up in weight. The first one is twist. I don't have the 1:12 twist, so I don't think the higher weights would stabilize enough. One other reason is the amount of powder, bullets, primers .... etc that I would burn up trying to work up a load that may or may not stabilize with my current barrel. Another, is the problem with finding a good area to shoot. So, difficult to work up a round specifically for 1000 yards.

Anyway, if there are others out there using 168's with some success, I would like to hear about what your using.
Some 168 grain bullets will make it to 1,000 when started at 2,550 fps...others will not, the 168 SMK (the bullet that gave all 168 grain bullets their bad reputation) will not...its all in the ballistic coefficient of a particular bullet.

I have had some success with Nosler 168 Ballistic Tips at 2,600 fps muzzle velocity (thats a very hot load in a 20" barrel, its hard on the brass)...I have not used the Hornady A-max except for the 208 grain.

You'll be darn lucky if you can get 2,550 fps from that barrel (I had one of those rifles)...2,520 was about all it wanted to produce.
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Old 06-23-2012, 08:58 PM
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Re: 168gr .308 to 1000 & Beyond .... Anyone Doing It???

I've shot the 168 SMKs out to 830 yards with sub MOA groups. Although my velocity is 2750 out of a 26" barrel 1:12 twist.

I'm currently loading up 175gr SMKs and I think that the 1:12 twist should work just fine to stabilize them.
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Scott
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Old 06-24-2012, 05:02 PM
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Re: 168gr .308 to 1000 & Beyond .... Anyone Doing It???

Well,

I'm currently getting around 2660 from those loads. And, I am no where near max with the AA2520. The reason I picked the 42.7gr charge was due to a very good accruacy node. I can take it all the way up to 44gr. Although it would give me much better velocity, the accuracy will drop off a bit.

Guess I'll just have to give er a try. The AMAX and the Noslers both perform the same in my Grendel, hope they perform the same in my .308.

I'll probably resurrect this thread when I finally get a chance to push it out to 1000.
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Old 06-24-2012, 09:18 PM
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Re: 168gr .308 to 1000 & Beyond .... Anyone Doing It???

Your 12 twist will easily stabilize the 178 AMAX, if you're a fan of Hornady bullets... I shoot the 178's in 30-06 and .308, and they'll cake-walk to 1000 yards with as little as 2500 fps MV.

Since it's hard to find a range to shoot 1000 yards, it would seem to me that you'd rather go with a sure thing--the heavier bullet--than hope for making enough velocity to get the 168's to 1000 yards, something you can't be nearly as sure of.

There are some "go to" .308 recipes with the 178's... you can work up to 44.2 grains of Varget for a likely 2600 fps from your 20" barrel... and 42.0 grains of IMR 4895 is a great recipe that works in most .308's, making around 2550 from your rifle, estimating of course. This is in Winchester brass, by the way...

You really won't need to spend a lot of time and material making the heavier bullets work. Click the link in my signature line for an understanding of the OCW loading process, and you'll hopefully see what I'm talking about. In less than 20 shots, you'll be pretty much there if you follow the directions.

For tighter extreme spreads, the larger case fill of the 44.2 grain Varget charge will serve you better.

Work up to these charges, of course. I shouldn't have to mention that--it should go without saying--but I've had some encounters with self appointed mall cops lately that may perhaps expect me to state the obvious anyway.

If you're really set on the 168's, stick with the AMAX... JBM says they'll make it to 1000+ with lower velocities as well. Play around with JBM a bit for some more info... http://www.jbmballistics.com/cgi-bin/jbmtraj-5.1.cgi

Dan
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Old 06-24-2012, 10:11 PM
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Re: 168gr .308 to 1000 & Beyond .... Anyone Doing It???

I have been playing with the 168 Berger hybrids and with 47.5 gr AA2520 out of a 22 in. Rem. 5R barrel I am getting 2800 fps. I am using Lapua palma brass and Fed. match primers. It will shoot 1/2 inch groups at 300 yds. if I do my part. I think the shorter bearing surface lets it be shot at higher velocities. It should give you more than enough velocity for your purpose.
Tarey
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  #7  
Old 06-25-2012, 04:59 PM
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Re: 168gr .308 to 1000 & Beyond .... Anyone Doing It???

Isn't that a mighty hot load with AA2520? My book says max is 44 grains.
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