7.5inch pdw, 556 or 300aac?

1199max said:
Whats up guys, i am shopping around for my next riffle and pretty much have decided to go with the NEA 7.5 PDW. now i am debating on getting it in 556 or 300aac. A friend of mine told me that 7.5 inch are not accurate at all in 556 and much better in 300aac. how much more accuate can it be at 50 yards? i dont plan on making such a short rifle perform at 100yards at all. if i can consistently hit a can of beer at 50yards with 556 thats fine with me.

also price of ammo isnt really a problem since i reload

cheers
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A 5.56 7.5 AR has to be the most obnoxious impractical firearm out there. You will not make any friends shooting one of these. 10.5 should be the shortest barrel length and that's pushing it.
 
Sqr said:
A 5.56 7.5 AR has to be the most obnoxious impractical firearm out there. You will not make any friends shooting one of these. 10.5 should be the shortest barrel length and that's pushing it.
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I agree with this. I have a shorty 10.5" PDW 5.56 and the blast is respectable...it's the shortest I'd go. I'm not a fan of exotic cartridges so I'd turn thumbs down on the 300AAC. If you must go to the larger caliber, I'd look at the 7.62x39. I'm pretty pleased with the way my shorty turned out [it's a homebuilt, basically].
 
From what I've seen, new production NEA ARs are fine. I picked up a 7.5" in 5.56mm for the novelty factor set up as a PDW with their CCS stock. Fit and finish was perfect. Thus far it has run without issue or failure. Totally impractical, but never fails to bring a smile to your face. You need to be cognizant of just how obnoxiously loud such SBRs are, however, so be respectful of fellow shooters. I generally shoot mine when the range is deserted in the early hours or middle of the week.
 
legi0n said:
please explain
I chop the 223 case below the shoulder
size it
anneal it
trim it

that's it
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my money is on that he never reloaded 300blk and is just going off of Wikipedia. I got tons of 223 converted brass, friend of mine actually bought a "jig"/ "mould" that lets you cut the case to 300blk ish size on a table saw.
 
CobraGT said:
I personally wouldn't go with either caliber - 7.62x39 is perfect in a 7.5", IMO. Cheap and plentiful ammo, decent velocity retained. Win, win.
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That depends on where the OP is located. I'd love to pick up an AR chambered in 7.62X39 but there are very few ranges in SW Ontario that allow surplus 7.62X39 to be used and since ARs are limited to range use only, that caliber would be one of the most expensive choices (range-friendly 7.62X39, ie. no steel in the projectile, is about a buck a round).
 
On the subject of the PDW in 5.56 & .300 Blackout I can tell you the following for sure, having been involved in several projects the more popular option has been the 5.56 PDW by far. Over the last 3 years I have fired about 40,000rds of assorted 5.56 & .223 through 7.5" upper both suppressed & un-suppressed, while everyone has opinions of why they don't like them / these projects are end user driven for very specific mission parameters!! The RCMP has seen fit to now change calibers for the ERT teams in the country & they have elected the .300 Blackout in 8.5" & 14.5" with suppressors, these are decisions & choices made by various operational requirements again. Not going to start a debate between calibers in this discussion as some are still debating 9mm vs .45ACP ( that was until the FBI's recent caliber change ), until wider adoption occurs in military SF elements the 5.56 PDW will not be leaving us any time soon & bonded or barrier blind ammunition has cemented that with a certain degree for now!!!

gadget
 
sky52 said:
my money is on that he never reloaded 300blk and is just going off of Wikipedia. I got tons of 223 converted brass, friend of mine actually bought a "jig"/ "mould" that lets you cut the case to 300blk ish size on a table saw.
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No I haven't, but I've made 222 rem out of 223 Rem, 308 Norma out of 300 WM, and 260 out of 308. Unless 221 is hard to come by I can't see why you'd go through the bother.
 
The .300 Black out was designed specifically for suppression you will notice than even rifles 16" chambered in .300 BO have carbine or even pistol length gas tubes because they were designed as a SBR / pistol the suppressor increases pressure for function its very pricy round certainly fun to play with loads etc however considering we can't own suppressors , I would not recommend .300 blackout SBR/pistol as your primary shooter .

X39 is Cheap and fun very obnoxious on the range in a SBR pistol but loads of fun I don't own a x39 SBR mine if 16" but I had the opportunity to shoot one recently at the range its as fun .

Bushy
 
legi0n said:
please explain
I chop the 223 case below the shoulder
size it
anneal it
trim it

that's it
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Above, or two tapered de-capping assemblies, 22 to 6.5 mm and 6mm to 308, and run some .221 Fireball through the sizer twice. By the time your case is ready I have a loaded round, unless I'm missing something specific to the .300 Blk, or the step from .224 to .308 requires something I'm unaware of. I'm assuming fresh brass would allow the neck expansion without any problems, but I've never gone up in diameter, only down.

I'm a little surprised you haven't had to ream the necks as well, I'd expect them to be a little thick forming them that far down the case.

I'm pretty far from being a rookie reloader, and assuming I'm correct about re-forming 221 brass, your way will take at least twice as long, mine about $30 more per 100 pcs. of brass :)puke: might be more like $60).

Edit Just took apart a .223 case to measure...no difference on the .223 I chopped. So no neck issues...see, I can answer my own questions, no need for Wiki.
 
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1199max said:
whats wrong with nea? being canadian priced closed to a norinco...
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Modify the search feature to go as far back as 3 years.
Brew a pot of coffee and start reading.
I'm proud Canadian and when they first came out I was going to buy one.
The first ones had a ton of problems and they have gotten better but not to the point which I would pay for one.

My recommendation, if you want to go with a 300BLK, is 10.5" because it's the most effective length for that round.
 
redshooter said:
Above, or two tapered de-capping assemblies, 22 to 6.5 mm and 6mm to 308, and run some .221 Fireball them through the sizer twice. By the time your case is ready I have a loaded round, unless I'm missing something specific to the .300 Blk, or the step from .224 to .308 requires something I'm unaware of. I'm assuming fresh brass would allow the neck expansion without any problems, but I've never gone up in diameter, only down.

I'm a little surprised you haven't had to ream the necks as well, I'd expect them to be a little thick forming them that far down the case.

I'm pretty far from being a rookie reloader, and assuming I'm correct about re-forming 221 brass, your way will take at least twice as long, mine about $30 more per 100 pcs. of brass.
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Once you chop the .223 down you will not be necking up to .308 but down ever so slightly.
 
The .300 would be more efficient than the 5.56 due to increased volume to burn powder in the short barrel. That said, I concur that 10.5 is a more practical length for PDW.

One of the guys at Tac Match has a 7.5" Noveske Diplomat PDW in 5.56 and he is able to routinely make hits out to 100m and beyond.
 
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