Ammo for AR-10 in .308

[bolt56]

Had a new barrel put on my AR-10. Rock Creek with 11.25 twist, 18" long, chambered for M118 175 ammo. Can't seem to get a handle on handload for it. Appreciate any advice & OAL of M118 ammo. Thanks

 

[EricCartmann]

Re: Ammo for AR-10 in .308

M118LR is basically just 175gr SMK bullets loaded to about 2550 fps (out of a 20" barrel). Now you may hear different FPS for M118LR, but we chron'd a batch about 2 years ago and this is what we got. Use 2.80" for your OAL.

 

[redbullitt]

Re: Ammo for AR-10 in .308

I have a standard chamber and usually go with 2.800 as well for a "typical" load, that way I can load them in any of my rifles.

What problems are you running into?

 

[bolt56]

Re: Ammo for AR-10 in .308

Just haven't found a very accurate load with RL15 & 175 SMKs.

 

[Pat M]

Re: Ammo for AR-10 in .308

41.5 - 43.5 R15 in that area. You did upgrade to a better trigger?

 

[EricCartmann]

Re: Ammo for AR-10 in .308

Oh and BTW, the powder looks like RL15 from what I hear. I can't tell you the charge for RL15, but for Varget, to get 2550 FPS out of a 20" barrel, you will need about 42.5 gr.

 

[bolt56]

Re: Ammo for AR-10 in .308

Yes, did upgrade trigger.

 

[bolt56]

Re: Ammo for AR-10 in .308

Thanks guys for info.

 

[zmann]

Re: Ammo for AR-10 in .308

Sorry to jump in your thread, but I have a GAP10 20" bartlein barrel with same twist and have a ton of 168 amax's. What loads do you guys use with Varget and RL15? Two powders that I use as well. I've got a few loaded up, just need to hit the range.

 

[vinsonr]

Re: Ammo for AR-10 in .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: zmann</div><div class="ubbcode-body">Sorry to jump in your thread, but I have a GAP10 20" bartlein barrel with same twist and have a ton of 168 amax's. What loads do you guys use with Varget and RL15? Two powders that I use as well. I've got a few loaded up, just need to hit the range.

</div></div>

Depends on your brass. I've loaded 178 amax with 44gr of Varget for my 18" N6 in Hornady match brass. With 168's I'd likely start at 44 and work up from there in commercial brass.

For Lapua or military brass you should certainly start at about 42 and work up.

 

[SICARIO]

Re: Ammo for AR-10 in .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: zmann</div><div class="ubbcode-body">Sorry to jump in your thread, but I have a GAP10 20" bartlein barrel with same twist and have a ton of 168 amax's. What loads do you guys use with Varget and RL15? Two powders that I use as well. I've got a few loaded up, just need to hit the range.

</div></div>

42.5gr of RL15 works well with my 18.5" barrel

 

[Prairie Dog Dundee]

Re: Ammo for AR-10 in .308

LC brass, Fed match primers, 175 g SMK, 43.1 grains of RL15 loaded to 2.81 is a duplicate of M118LR. The RL15 in M118LR has a flash suppressant otherwise it is a duplicate. It shoots around 1/2 moa in my LMT MWS.

 

[zmann]

Re: Ammo for AR-10 in .308

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Vinson</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: zmann</div><div class="ubbcode-body">Sorry to jump in your thread, but I have a GAP10 20" bartlein barrel with same twist and have a ton of 168 amax's. What loads do you guys use with Varget and RL15? Two powders that I use as well. I've got a few loaded up, just need to hit the range.

</div></div>

Depends on your brass. I've loaded 178 amax with 44gr of Varget for my 18" N6 in Hornady match brass. With 168's I'd likely start at 44 and work up from there in commercial brass.

For Lapua or military brass you should certainly start at about 42 and work up. </div></div>

Thanks for your replies. I've got a TON of once-fired Federal Match Brass with the "FC ?" stamped on the bottom. I've heard it's pretty soft brass.

The other brass I have a lot of is the WCC 08 stamped brass that had the crimped primers.