7.62x39 vs 300 Blackout

Sqr said:
KSome hand loaders are posting close too performance and ARP,s barrel manufacture himself states high performance on other 6.8 SPC loading forums. The benefit is a high performance cartridge in a lighter AR platform over a heavier fully loaded AR 10. I am not implying it has superior performance then a 308 as much a saying it is a good choice and is my selection over the inferior 300/7.62's.

I really like mine.

Suggested loads-
125gr Sierra prohunter loaded to 2.240-30.5gr 1680=2610fps CCI 450 primer
125gr Nosler Ballistic tip loaded to 2.3"-30.5gr 1680=2680fps CCI 450primer
110gr Barnes TSX loaded to 2.295, 31gr 1680=2678fps
110gr Barnes TSX loaded to 2.295, 32gr 1680=2796fps


9aacfe0add6fa5ab21ea5f6debba4845_zpsxxqyvktz.jpg
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Let's see a pic of the rifle.
To me I don't see the point in these other cartridge options in a restricted rifle. The only reason I have a 300BLK AR is because I also have a 300BLK bolt action and my 300BLK conversion for my NR ACR. I was already setup to load for it and since I also love AR's I decided to build one. To me the benefits of these cartridges are lost completely at the range. The truth is that ballistically the 223/5.56 kills them all for flat shooting and price so if you're going to simply play at the range then I don't see the point.
 
I do it for hunting, but that is really only because we finally got a NR platform worth building off of here in Canada, the ACR. The wildcats and hand load only calibers are problematic at best for the average person, even the 30AR is kind of borderline that way to me, but I am making it work on the same bolt face as my 450 Bushmaster ACR so I can always swap barrels and have factory loadings again if I run out of loaded brass

This would all be a non issue and eventually will be simple once bushmaster releases the conversions they promised/marketed for the ACR initially
 
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cr5 said:
Let's see a pic of the rifle.
To me I don't see the point in these other cartridge options in a restricted rifle. The only reason I have a 300BLK AR is because I also have a 300BLK bolt action and my 300BLK conversion for my NR ACR. I was already setup to load for it and since I also love AR's I decided to build one. To me the benefits of these cartridges are lost completely at the range. The truth is that ballistically the 223/5.56 kills them all for flat shooting and price so if you're going to simply play at the range then I don't see the point.
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I am also building another 20" AR Jury Barrelled firearm and planning on a bolt action rifle.
 
I have an 8.25" barrel coming for a 300 blk build.

Afaik, none of the others mentioned work well in that short a barrel.
 
cr5 said:
The only reason I have a 300BLK AR is because I also have a 300BLK bolt action ...
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Is that the Remington Tactical 300 Blackout bolt action you refer to?

Btw, I appreciate your informative posts :cool: You too Saputin :)
 
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Sqr said:
541b58aba4f0d3ae07edcc325a480ae5_zpsyivvvy5u.jpg


I am also building another 20" AR Jury Barrelled firearm and planning on a bolt action rifle.
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Wow! That is a very nice rifle. Well done on that build. The only change I would make is to ditch the AFG. How long is that barrel?
Too bad you don't have a non restricted ACR to slip an 18.5 inch barrel like that into. Then you'd be able to use that awesome cartridge for more than punching holes in paper and banging steel.
Do you own any of the 6.8 pmags? I have one but haven't taken it out of the package yet. Wondering how well they feed.
 
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zxcvbn said:
Is that the Remington Tactical 300 Blackout bolt action you refer to?

Btw, I appreciate your informative posts :cool: You too Saputin :)
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Yes, I have a 16 inch Rem 700 AAC-SD in an AICS chassis, my non restricted ACR conversion that Suputin built me a barrel for, and a 12 inch AR with a custom barrel compliments again of Suputin.
 
zxcvbn said:
Is that the Remington Tactical 300 Blackout bolt action you refer to?

Btw, I appreciate your informative posts :cool: You too Saputin :)
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FWIW I have a custom made 300 BLK bolt gun built on a Rem 700 (17 Fireball) action that is in a Cadex chassis. I also have a 7" PDW AR as well as a 10" AR and a 12" NEA AR all in 300 BLK. I built the 7" and 10" bbls myself.

The 10" AR is running a Law Tactical folding stock and a custom built, fully adjustable captive recoil spring system. The 12" NEA is pretty much stock as it just gets used for testing ammo etc.
 
cr5 said:
Wow! That is a very nice rifle. Well done on that build. The only change I would make is to ditch the AFG. How long is that barrel?
Too bad you don't have a non restricted ACR to slip an 18.5 inch barrel like that into. Then you'd be able to use that awesome cartridge for more than punching holes in paper and banging steel.
Do you own any of the 6.8 pmags? I have one but haven't taken it out of the package yet. Wondering how well they feed.
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Thanks for the feedback. You gave me a wonderful idea to purchase and modify a 6.8 SPC NR ACR to this caliber. I can either have a custom barrel cut or use my reamer on a 300 ACC barrel. Then I can continue to use my AR build down south and the ACR up in Ontario.

I would like to try the PMAG if I could find a retailer. As for the barrel it is a 16" mid length gas system.
 
cr5 said:
Yes, I have a 16 inch Rem 700 AAC-SD in an AICS chassis, my non restricted ACR conversion that Suputin built me a barrel for, and a 12 inch AR with a custom barrel compliments again of Suputin.
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Suputin said:
FWIW I have a custom made 300 BLK bolt gun built on a Rem 700 (17 Fireball) action that is in a Cadex chassis. I also have a 7" PDW AR as well as a 10" AR and a 12" NEA AR all in 300 BLK. I built the 7" and 10" bbls myself.

The 10" AR is running a Law Tactical folding stock and a custom built, fully adjustable captive recoil spring system. The 12" NEA is pretty much stock as it just gets used for testing ammo etc.
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Pics? cou:

But no worries if not, just curious how you guys are building :cheers:

Especially interested in the bolt action i.e. non-restricted builds :redface:
 
Greenhorse six said:
Thread hijack , what's the story on barrel lengths , more so the restricted AR ones ?
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Barrel length in ARs doesn't mean anything in Canada. They're all restricted regardless of barrel length. Be it 7.5" or 24" barrel... all restricted. Unlike the USofA that requires a Federal tax stamp for barrels under 16".
 
Okay ,thanks for that .............
Trinimon said:
Barrel length in ARs doesn't mean anything in Canada. They're all restricted regardless of barrel length. Be it 7.5" or 24" barrel... all restricted. Unlike the USofA that requires a Federal tax stamp for barrels under 16".
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I was more interested in if there was a reason for one length over the other with the .300 , from what little I know and read about it , it likes the shorter barrels , mostly because of the fast burning pistol powder it uses , again , just from little reading on other forums , so with out barrel restrictions why would you use a barrel longer then 10" ?

I'm thinking of getting a .300 blackout barrel , just something to try it out , just because , so , what's an ideal barrel length for the .300 ?
 
Sqr said:
Thanks for the feedback. You gave me a wonderful idea to purchase and modify a 6.8 SPC NR ACR to this caliber. I can either have a custom barrel cut or use my reamer on a 300 ACC barrel. Then I can continue to use my AR build down south and the ACR up in Ontario.

I would like to try the PMAG if I could find a retailer. As for the barrel it is a 16" mid length gas system.
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I bought the 6.8 pmag at Tier One Armoury in Edmonton.
You can only buy ACR's in 223 right now. All my conversions are custom built.
I've run my ACR 6.8 barrel in an AR but haven't tested it in my ACR yet. It's a Questar stainless barrel like my 223 NR barrel, I had a 223 bolt opened up to use with the 6.8.
Any AR barrel with a midlength gas system will drop right into an ACR. The ACR gas system is more efficient than an AR though so you want a smaller gas port than an AR would have for that caliber and barrel length.
 
Greenhorse six said:
Okay ,thanks for that .............


I was more interested in if there was a reason for one length over the other with the .300 , from what little I know and read about it , it likes the shorter barrels , mostly because of the fast burning pistol powder it uses , again , just from little reading on other forums , so with out barrel restrictions why would you use a barrel longer then 10" ?

I'm thinking of getting a .300 blackout barrel , just something to try it out , just because , so , what's an ideal barrel length for the .300 ?
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My bolt action is 16 inch and shoots sub moa with my 155gr A-Max handloads, my NR ACR conversion is 18.5 inch and shoots the same loads sub moa, my AR is 12 inch and doesn't like that load as much, it shoots everything fairly well but I haven't done any load development with that one in order to figure out what it likes. My first 300BLK was a PWS piston upper with a 9.75 inch barrel and it would shoot my 110gr V-Max handload sub moa. The 300BLK will function fine with an 8-19 inch barrel and doesn't lose velocity as quickly as a 223 does as you shorten the barrel. I've found that 300BLK can work very well at all barrel lengths and is a very accurate round at the distances I've shot with it.
 
zxcvbn said:
Pics? cou:

But no worries if not, just curious how you guys are building :cheers:

Especially interested in the bolt action i.e. non-restricted builds :redface:
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These are my 300BLK rifles, ACR is non restricted. The first pic is of my AR build when it was in an NEA upper, I have since moved the barrel and BCG over to a Daniel Defense upper as seen in the second pic with all three rifles. The AR has a Hi-Lux CMR-AK 1-4 which has a great reticle for the 300BLK.
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Greenhorse six said:
Okay ,thanks for that .............


I was more interested in if there was a reason for one length over the other with the .300 , from what little I know and read about it , it likes the shorter barrels , mostly because of the fast burning pistol powder it uses , again , just from little reading on other forums , so with out barrel restrictions why would you use a barrel longer then 10" ?

I'm thinking of getting a .300 blackout barrel , just something to try it out , just because , so , what's an ideal barrel length for the .300 ?
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My bolt gun has a 12" bbl but the length was chosen more for specific performance and configuration reasons than anything else.

The 7" PDW was just kinda to see if it would work and cause a 556 PDW is just obnoxious.

The 10" is my go-to rifle and that bbl length was chosen to go with the forend and muzzle device I wanted to use. IIRC 9" is supposed to be the sweet spot for an AR bbl but an extra inch either way prob doesn't make much difference.

The 12" came complete from NEA and is only used to test ammo and muzzle devices for production and design reasons.
 
For hunting purposes, I keep looking at the 300BLK as an updated 30-30, with the various bullets available for it. A deer and yote gun to about 250 yards that is a pleasure to shoot.
 
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