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#6910682 - 10/05/17 10:29 PM 2nd AR, Which Caliber?
TexasEd Offline
THF Trophy Hunter

Registered: 09/27/07
Posts: 5016
Loc: Cedar Park, Texas
I have a 5.56 but think I want a larger caliber for plinking and possibly game and maybe getting into long range shooting out to 500 at steel.

Should I just go .308 or consider other calibers? I think price of ammo should come into consideration as well as ballistics performance. Lower consideration might be a lower that can work with different cartidges depending on the upper but not a big deal.
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#6910720 - 10/05/17 11:20 PM Re: 2nd AR, Which Caliber? [Re: TexasEd]
txbigly Offline
Pro Tracker

Registered: 09/06/06
Posts: 1028
Loc: Rockwall
Id look at a 6.5 Ammo is a little more but I like it.
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#6910723 - 10/05/17 11:23 PM Re: 2nd AR, Which Caliber? [Re: TexasEd]
TexasEd Offline
THF Trophy Hunter

Registered: 09/27/07
Posts: 5016
Loc: Cedar Park, Texas
if 6.5 then which cartridge and why?
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#6910725 - 10/05/17 11:30 PM Re: 2nd AR, Which Caliber? [Re: TexasEd]
Kevin1 Offline
Tracker

Registered: 04/06/11
Posts: 672
Loc: Allen Tx
Keep your 5.56 for shooting steel at 500Y. Load some 73gr ELDM and you can shoot at 800Y.

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#6910747 - 10/06/17 01:51 AM Re: 2nd AR, Which Caliber? [Re: TexasEd]
Sneaky Offline
The "Grouch"

Registered: 10/22/12
Posts: 18977
Loc: Winters
Grendel.
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#6910775 - 10/06/17 05:51 AM Re: 2nd AR, Which Caliber? [Re: TexasEd]
P_102 Offline
Pro Tracker

Registered: 09/23/08
Posts: 1150
Loc: Grapevine
Grendel. (just get an upper that you swap out) The BC of the bullets in this cartridge allow it to stay supersonic out to 1200 yards (Hornady AMax). You can also get plinker rounds for about $.50 per round. The 73 gr. ELDM in a 5.56 may work but you may have to get a barrel with a faster twist rate.

P_102
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#6910793 - 10/06/17 06:31 AM Re: 2nd AR, Which Caliber? [Re: TexasEd]
colt45 Offline
THF Trophy Hunter

Registered: 08/19/06
Posts: 8442
Loc: bastrop county
if you can afford it, 6.5 creedmoor,
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#6910798 - 10/06/17 06:37 AM Re: 2nd AR, Which Caliber? [Re: TexasEd]
hetman Offline
Veteran Tracker

Registered: 02/15/15
Posts: 3277
Loc: Addison Tx or Cisco Tx
if you upgrade to a AR10 - get a light weight one like the DPMS gen2.
I have a regular AR10 in .308 16" barrel that simply shoots lights out but with scope is over 10lbs. Plus you really don't need a heavy bull barrel if its going too be used as a hunting rifle


Edited by hetman (10/06/17 06:41 AM)
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#6910857 - 10/06/17 07:45 AM Re: 2nd AR, Which Caliber? [Re: TexasEd]
Tactical Cowboy Offline
Extreme Tracker

Registered: 08/23/11
Posts: 3634
Loc: Snyder
308
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#6910859 - 10/06/17 07:47 AM Re: 2nd AR, Which Caliber? [Re: TexasEd]
9x19 Offline
Woodsman

Registered: 10/07/14
Posts: 101
I settled on 9mm, 5.56 and .300 AAC for my own uses.

I've owned them in .308 and 7.62x39 as well.

Good luck with your choice.

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#6910872 - 10/06/17 07:58 AM Re: 2nd AR, Which Caliber? [Re: TexasEd]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 26107
Loc: Wolfe City, TX
The only AR I had was a 5.56. I wanted more energy and the ability to keep that energy to 500 yards. I crunched numbers, and looked at the cost of several options. Due to the nature of energy delivery, the huge amount of brass that is widely available, and the huge amount of bullets that are widely available, I got back into the .308 business, after being out of it for 3 years. Fact of the matter is, the 5.56 and the .308 are military cartridges, therefore there is a plentiful supply of brass for both.

I have spotted for several 6.5 Grendels, and they have flown just fine to 800 yards, shooting very precise, but it is impossible for them to deliver the energy of the good ole .308. The 6.5 Grendel is a great little cartridge, but I wanted more punch on feral hogs.
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#6910894 - 10/06/17 08:12 AM Re: 2nd AR, Which Caliber? [Re: FiremanJG]
garyrapp55 Offline
Tracker

Registered: 12/26/11
Posts: 970
Loc: Ft. Worth
Originally Posted By: FiremanJG
Due to the nature of energy delivery, the huge amount of brass that is widely available, and the huge amount of bullets that are widely available, I got back into the .308 business, after being out of it for 3 years. Fact of the matter is, the 5.56 and the .308 are military cartridges, therefore there is a plentiful supply of brass for both.

I have spotted for several 6.5 Grendels, and they have flown just fine to 800 yards, shooting very precise, but it is impossible for them to deliver the energy of the good ole .308. The 6.5 Grendel is a great little cartridge, but I wanted more punch on feral hogs.


Agreed 100%. If you don't intend to hunt with it the Grendel is a pretty flat shooter to 500 no problem. The 308 will do that and include the energy. 308 is AR10 and requires a complete new rifle. The Grendel requires only an upper swap of the 556 you already have. 2 pins out, 2 pins in and done (maybe a different mag too). Of course like was said earlier, you could shoot heavier bullets to 500 in 556/223 and give me that extra money.

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#6911038 - 10/06/17 10:00 AM Re: 2nd AR, Which Caliber? [Re: TexasEd]
kmon1 Offline
junior

Registered: 09/27/06
Posts: 23511
Loc: Texas
Depending on what you are wanting to do. 308 if like Fireman you are wanting to engage hogs at 500 yards Grendel if just wanting to shoot 500 and still drop hogs out to 400 yards or so. (Grendel has more energy at 400 than a 243)
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#6911043 - 10/06/17 10:05 AM Re: 2nd AR, Which Caliber? [Re: TexasEd]
QuitShootinYoungBucks Offline
THF Trophy Hunter

Registered: 11/01/12
Posts: 9220
Loc: Lubbock, TX
For plinking and steel, follow the other advice (if you have the barrel twist) and shoot heavier .223 loads.

The 6.5 Grendel, 6.8 SPC, and .300 BLK are your main choices if you just want to swap an upper. If you're not an amazing shot, I wouldn't recommend any of these past 200-250 yards for game, as the energy levels just aren't there.

If you're really going to hunt with it I would suggest stepping up to the AR10 platform and going with (in order of my preference only) .308, 7mm-08, 6.5 Creedmoor or even .243. The new Savage MSR 10 can be had in .308 or 6.5 and doesn't weight much more than an AR15. The DPMS Recon GII is another option, as FJG mentioned. Either of those would work well. If you don't mind extra weight, you can get a PSA AR10 for about $600-700 right now. There are other options too.
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#6911057 - 10/06/17 10:18 AM Re: 2nd AR, Which Caliber? [Re: TexasEd]
wtjim Offline
Tracker

Registered: 07/18/12
Posts: 636
300BO or 6.5G

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