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Optimum weight for 1000y, .308

 
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  #1  
Old 06-28-2012, 06:54 PM
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Join Date: Jan 2012
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Optimum weight for 1000y, .308

Hi all,

After reading heaps of posts her and elsewhere, i think i have been led up the garden path.

I have been told I should use a 150gn projectile to shoot 1000 yards, is this too light, what do you guys use.

My rifle is 308, 22 inch barrel with a 1 in 10 twist. Trigger job done, strengthened synthetic fully floated stock, bedded as best as can be, according to my smithy.

So what is the optimum weight and how heavy or light can i go

Thanks in advance
Rob
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  #2  
Old 06-28-2012, 08:36 PM
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Re: Optimum weight for 100y, .308

I don't use the 308 myself, but a 150 is a great bullet to 400-500 yards for deer in the 308/30-06. Longer range, and you will want to move up to a 178 match or so weight wise. The 308 starts to suffer to much speed wise when you get much heavier.
The 155 Palma also comes to mind, but that is for the Palma competition where bullet weight is locked to 155gr to level the playing field.
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  #3  
Old 06-30-2012, 06:47 AM
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Re: Optimum weight for 100y, .308

Im a hunter not a paper target shooter. Ive hunted with 06 and 308s for proably 40 years or more. Ive used bullets from 150-180 in both. Anymore when i hunt with either i use nothing but 150 cup and core bullets. I limit them to about 350 yards. Maybe a touch more with the o6. Ive yet to see any animal walk away from one. I prefer the 150s because they tend to knock animals down quickly. the 06 is very popular up here like it is in many places. Id bet i did more tracking of wounded deer shot with 180 grain 06s then all other rounds combined. Most 180 grain .30 cal bullets, even cup and core bullets are designed to hold up to 300 mag velocitys and dont open up well on light skinned deer, especially at longer ranges. There not a good recipe for quick kills. 165s might be a good compromise but with the luck ive had with 150s ive never seen a need to change.
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Old 06-30-2012, 10:10 AM
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Re: Optimum weight for 100y, .308

Back in the day when I fielded an '06, I used the 165 hornady boat tail with a stiff charge of 4350 and a mag primer. Using h414/760 or similar you would be very close to the 2900fps I was getting with this, at least 2800. The nos bt has a bit better bc and a softer nose, so it may be a better option.
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  #5  
Old 06-30-2012, 10:55 PM
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Re: Optimum weight for 100y, .308

I like the 175gr Berger OTM with Lapua Brass, CCI BR2 primers, an IMR4064 powder running around 2650 fps from a 20" 1:10" barrel, suppressed.

They feed nicely from the AICS magazine.

For a single shot, there are some higher BC bullets in that weight range. I'd be leary of going much over that in a 308 unless you've got it throated long. Otherwise, you'll lose case capacity and MV.

-- richard
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  #6  
Old 07-02-2012, 08:52 AM
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Posts: 366
Re: Optimum weight for 100y, .308

If all you are shooting is a target at a 100 yards then the speer tnt 130gr will work.
Shooting game would stick with the 150gr bullet, some type of a spitzer will work well.
The 155gr are a palma bullet and shoot past a 100 yards very well they carry a good BC
and have thin jackets so not a great bullet for hunting....
now you have my ....... .02
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  #7  
Old 08-28-2012, 01:05 AM
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Join Date: Jan 2012
Posts: 41
Re: Optimum weight for 1000y, .308

Hi guys,
Thanks for all your help so far. ( I noted i typed 100y on the title, but i meant 1000y)

I have been mucking around with size and powder and have settled on

165gn Sierra gameking as a multi purpose projectile.

With 42.5gn ar2206h (ADI powder) i am getting .645moa at 100y and still just under .9 at 450y (my longest distance at my current range).

So i have had a trigger job done and its now 2 lb, i have strengthened the fore stock to make sure i stay fully floated, added a bi-pod.

Now the next question is, what do i do next to bring it down some more?


Do i play with distance from lans, or crimping projectile or something else?

I mean, what will give me the best drop, because if my calcs work, .6@100, .9@450 so about 1.5@1000 by doubling my error, so thats 18 inches, on the card but could be better.
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