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Old 01-20-2020, 02:44 PM   #1
2BigMethod
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Default Ar hunting pistol which caliber?

Looking to build ar pistol but cant decide on which caliber. Realistcally not planning on shooting pass 300 yards.
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Old 01-20-2020, 03:15 PM   #2
lglidewell
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If you are planning on shooting deer size game, 6.5 Grendel is an awesome round. My 12.5" SBR's are my go to.
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Old 01-20-2020, 03:21 PM   #3
Budman68
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I've been using a 12.5 in 300 BO with subsonic rounds. Easy on the ears and everything dies. Not sure that would be a great round for 300 yards.
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Old 01-20-2020, 03:27 PM   #4
Gunnyart
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Black out burns its powder in 9" so it works well in short barrels but 300yds would be a long shot with a ton of drop.
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Old 01-20-2020, 03:35 PM   #5
scott.str
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300 yards is a long ways for a pistol. About the only one would be the grendel that could do it but man your hurting your speed alot with that. Ive got an 18" and the accuracy node is at 2350 fps. Factory ammo is at 2490. you would be down in the 2250/2300 range with factory maybe and a 300 yard shot on a deer may be a bit much then.
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Old 01-20-2020, 03:51 PM   #6
roughneck266
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I have a 6.5 Grendel 12" SBR that has no problem doing 300. For a shorty, and distance, I think it's about as good as it gets in a small frame AR. Killed plenty of pigs with it, so deer won't be an issue either.
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Old 01-20-2020, 04:08 PM   #7
2BigMethod
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Yeah 6.5 seems to be the ideal canidate. I have 300bo but in 16" upper.
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Old 01-20-2020, 10:21 PM   #8
ahlongslide
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Another Grendel vote
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Old 01-20-2020, 10:36 PM   #9
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450 bushmaster.


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Old 01-20-2020, 11:03 PM   #10
Drycreek3189
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The 6.8 SPC was designed for use in short barrels for close quarter firearms. My pistol is a .223 but that’s only because I bought it used at a good price. If I were going to build or buy new, it would be a 6.8 SPC.
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Old 01-20-2020, 11:17 PM   #11
xman59
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Quote:
Originally Posted by 2BigMethod View Post
Looking to build ar pistol but cant decide on which caliber. Realistcally not planning on shooting pass 300 yards.
not trying to be rude but your expectations are un realistic,,,, if you want 300 yards with effectiveness,,, you need a rifle length barrel,,
either handgun hunt.... or don't
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Old 01-21-2020, 09:35 AM   #12
2BigMethod
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I say 300 yards to push the limit but effective would be little further than my bow can shoot. I would much rather take aim with my bow but in those instants that game is out of reach id like not let that trophy get away. I already have big rifle 30-06 but it gets old carrying both thus why im looking for something little more compact.
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Old 01-21-2020, 09:52 AM   #13
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Putting finishing touches on mine this week.

Doing 300 BO- 10.5" barrel, SBA3 Brace. Going to shoot supersonics and run a reflex sight. Should hammer anything i point at inside 100 yards without issue.

If I had not scored a deal here on TBH I would have gone 350 Legend though. Throw an even bigger hammer.
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Old 01-21-2020, 11:50 AM   #14
xman59
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Quote:
Originally Posted by 2BigMethod View Post
I say 300 yards to push the limit but effective would be little further than my bow can shoot. I would much rather take aim with my bow but in those instants that game is out of reach id like not let that trophy get away. I already have big rifle 30-06 but it gets old carrying both thus why im looking for something little more compact.
look at the contender pistols ,,, huge selection of rounds to pick from,,, extreme accuracy and will deliver at long range
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Old 01-21-2020, 11:57 AM   #15
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Another vote for 6.8 SPC
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Old 01-21-2020, 01:51 PM   #16
lglidewell
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These are my longest SBR kills with the 12.5” Grendel. It’s more than capable at 300. I shot my biggest/heaviest buck on my parents place with it a couple yrs ago at 210yds.

DRT’d in the head at 381yds. I was aiming at the neck.



DRT’d at 260yds - neck shot.




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Old 01-21-2020, 10:20 PM   #17
joel45acp
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I’d go with a 6.8.
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Old 01-22-2020, 12:07 AM   #18
TacticalCowboy
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Kinda cracks me up how 10 years ago a 30-30 wasn’t capable of a 150 yard shot, but these days a 300 BO is a deer hammer past 300 yards...

OP I’d go 6.8 or 6.5. I’ve only used 300 bo and 223 for hunting, and they were both within 150 yards.
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Old 01-22-2020, 03:29 PM   #19
Bily Lovec
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New bullets
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Old 01-22-2020, 03:39 PM   #20
kcmarullo
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I would go Grendel.
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Old 01-22-2020, 04:21 PM   #21
BigJimmyRustler
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.308 handles a shorter barrel well and can be had in an AR platform.
I can't think of any other caliber that would get you that far out effectively in a shorter barrel.
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Old 01-22-2020, 04:55 PM   #22
Leverhunter
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Maybe 350 legend but 300yd is probably too far. Look at Contender/Encore in a capable caliber.
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Old 01-22-2020, 07:04 PM   #23
Fordnandez
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Quote:
Originally Posted by BigJimmyRustler View Post
.308 handles a shorter barrel well and can be had in an AR platform.
I can't think of any other caliber that would get you that far out effectively in a shorter barrel.
This is what I want to do. I want to try to get a AR10 308 as light as economically as I can.
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Old 01-22-2020, 09:24 PM   #24
TacticalCowboy
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Quote:
Originally Posted by Bily Lovec View Post
New bullets
Eh.. 125 SST out of the BO and a 160 FTX out of a 30-30 (at 2400 FPS and 2300 FPS, respectively) have nearly identical drop, with the 30-30 retaining 100 FPE more than the BO.


This is all just pulled off of Hodgdon’s site and run through the hornady calculator.
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Old 01-24-2020, 01:20 PM   #25
Balcones_Walker
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Lately 7.62x39 - cheapest ammo of all, punches bigger holes than Grendel, and I like the recoil impulse on the AK platform - I get back on target fastest with it. I have my eye on a 45-70 lever or 458 SOCOM for thick brush though.
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Old 01-24-2020, 10:02 PM   #26
xman59
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Originally Posted by Balcones_Walker View Post
Lately 7.62x39 - cheapest ammo of all, punches bigger holes than Grendel, and I like the recoil impulse on the AK platform - I get back on target fastest with it. I have my eye on a 45-70 lever or 458 SOCOM for thick brush though.
i have both and they are fantastic,,, those 45 cal slugs hit like Thor's hammer!
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Old 01-26-2020, 07:46 PM   #27
Flex
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Well. Got my 300BO set up and zeroed. Shoots well, shot a pretty good 3round group after zero, two almost touching third pulled about 2" left.

As good as I'm gonna get until I can find a rest to set it in. Definitely hard on my eyes to find a bullseye at 50 yards with a no magnification holographic sight.

Will update if I shoot a pig with it and post results. Shooting 125 gr hornady supers hollow tip.

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