9" PDW: 5.56, 300 Blkout or 7.62X39?

mmattockx said:
As a Kanuck suffering under our insane gun laws, limited to 10 round XCR mags in my range-only AR toys the taper of the x39 and the banana mags to accommodate it are moot points. What is not a moot point is the cost difference in ammo along with not having to scurry around picking up x39 steel cases because it isn't worth reloading.

I bought a 10.5" PSA x39 upper and have been completely satisfied with it so far. I get the superior AR ergos, controls and operation with the cost of shooting an SKS or CZ858/vZ58. I also have a Norc CQ-A (the 14.5" M4 clone) and a home assembled 16" heavy match barrel DMR style AR chambered in .223 Wylde so I do have a cross section of use and experience. I may add a 10.5" Norc AR in 5.56 just to complete the set but I still think I will shoot the x39 more than the others.

For a non-Kanadian hobbled 9" AR then I would say that 300BLK is probably the best choice overall.
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I have a 7" PSA in 7.62x39, and with the 10-rd stick mags it's been awesome. I agree 100%
 
legi0n said:
there are always other more common and better calibers for hunting
but it's all up to the hunter.
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True. The cost of 300blk the scarcity of ammo, the limited rifle selections and limited performance put it far behind most common calibres.
 
mildot said:
We are on the same page, thinking "out loud" the 300 BLk seems to me to be a solution without a problem? I like the caliber and the CQB suppressor application but I'm thinking that if??I assaulting a compound and I have to make a 400m shot well I'm fu*ked. If I'm using a 556, I can just attache the suppressor when I get ready to do the entry? If I"m taking out "sentry's" then I'm going with a suppressed bolt gun, I don't see the advantages of a 300BLK? YYMV
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I don't think you will be shooting at 400m unless you have a full size rifle with decent optics to detect and ID the target, unless you are sure the compound is all unfriendly and you are setting a support base to wreck it. The other way, if you are going to raid a compound with 400m open ground and ready to set up a support base, I doubt you will be bringing a 9" convert assault rifle to the fight to begin with either!

The 300 blackout is a special weapon - why will I want a 125gr bullet vs a 62 or 77gr bullet? At low velocity out of a 9" the specialty bullets perform more reliably with the 30 cal format. In FMJ format, it punches through better in barrier like brick walls and general "stuff". In exchange, it cuts the "practical" "shootable ranges down to 150m'ish. It is really the extended logic to 13" 7.62 battle rifle. They are horrible weapons when it comes to "practical shootable" ranges, considering the weight of the gun and ammo. But it exists to address some short comings of 5.56, though the trade off is probably not worth it in full size 308 SBR ( it is still a lot of fun to shoot 308 SBR)
 
greentips said:
I don't think you will be shooting at 400m unless you have a full size rifle with decent optics to detect and ID the target, unless you are sure the compound is all unfriendly and you are setting a support base to wreck it. The other way, if you are going to raid a compound with 400m open ground and ready to set up a support base, I doubt you will be bringing a 9" convert assault rifle to the fight to begin with either!

The 300 blackout is a special weapon - why will I want a 125gr bullet vs a 62 or 77gr bullet? At low velocity out of a 9" the specialty bullets perform more reliably with the 30 cal format. In FMJ format, it punches through better in barrier like brick walls and general "stuff". In exchange, it cuts the "practical" "shootable ranges down to 150m'ish. It is really the extended logic to 13" 7.62 battle rifle. They are horrible weapons when it comes to "practical shootable" ranges, considering the weight of the gun and ammo. But it exists to address some short comings of 5.56, though the trade off is probably not worth it in full size 308 SBR ( it is still a lot of fun to shoot 308 SBR)
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I agree with your points, I used the compound example as it was easy, it's probably full of flaws, I do like the performance and ballistics of the 300blk for CQB in 8" guns, it very quiet and almost no felt recoil, and I see the benefits of that, but I know that some think it can be used in a dual purpose role as a DMR in a 14.5 rifle? I'm not expert, so I'll have to see the data and after action reports.
 
The advantages and disadvantages comparing x39 and 300BLK to 223 have been discussed thoroughly, one thing I'd like to add to the 300BLK vs 7.62x39 debate is that if you were to limit the 300BLK to only shooting 110-125gr projectiles there is no advantage and the lower cost of x39 wins the battle. On the other hand if don't care about the price and you know where to shop 300BLK or if you are a handloader then in my opinion 300BLK is superior to both of the other options since it can be loaded with everything from 90gr projectiles up to 220gr with velocities from 2500-900 fps depending on the projectile chosen which makes it extremely versatile. My 155gr AMAX handload will shoot sub moa in two of my rifles and I would feel very confident taking down a deer at under 150 yards with it. As for any of their abilities to puncture body armor I don't care, I don't shoot people.
Even though we can't use suppressors here being able to shoot subsonic is still nice, it is quieter than a similar projectile shooting supersonic, you do still have to wear your hearing protection but the sound doesn't travel as far so your neighbors are less annoyed.
I'm not sure how many of you who are talking about suppressors have ever shot a suppressed AR running supersonic 223 but just in case you only have the TV to guide you, you still have to wear hearing protection. I've shot 223 and 300BLK suppressed and unsuppressed and we had supersonic and subsonic loads for the 300BLK and subsonic suppressed is the only time you don't need you hearing protection.
 
^^^

300AAC BlkOut is an excellent round if you handload, as it can be assembled at a reasonable cost in large quantities. It is an effective hunting round for smaller game such a black tailed deer at usual hunting distances (under 150M) and you have a choice of bullets to compliment the intended role.

Yes, I'm a fan boy of this particular round, but it is such a sweet one to fire. No competition here, 300AAC BlkOut is the winner here.

Candocad.
 
Plus converting a 223 rifle into 300BLK only requires a barrel swap and nothng else. This makes conversion cheap. My 300BLK ACR conversion is one of my rifles that will shoot sub moa with my handloads. It's a soft shooting and accurate intermediate range cartridge.
 
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