Only advantage 9mm has is the cost/availability of ammo. I sold my 9mm set up to get into 300blk.

 

I'd shoot a whitetail with a 300blk. 9mm not so much.
If you don't reload or have a suppressor blk isn't gonna be much fun.

 

Does 9mm have any advantage over .300 BLK other than ammo cost?

nope...

 

Only advantage 9mm has is the cost/availability of ammo. I sold my 9mm set up to get into 300blk.

Ah, you sold that badass looking 9mm SBR. That's the nice thing about using a standard lower - just move your lower and stamps to the next build.

 

I'd shoot a whitetail with a 300blk. 9mm not so much.
If you don't reload or have a suppressor blk isn't gonna be much fun.

If you're gonna go 300blk you gotta reload, and if you really wann do it cheap, you gotta cast... FYI, I know a couple guys... ;-)

If I didn't have friends who were in the 300blk game already, I'd be less interested in this idea. But even otherwise, I figure I don't need to shoot a lot of it to be sufficiently proficient for my intended purposes, and I figure shooting .22lr and 5.56 AR's with the same manual of arms reduces the need to shoot a whole lot of 300blk.

As for the suppressor, part of the idea of going short barrel is having the option to travel the Class 3 road at some point in the future.

 

If I didn't have friends who were in the 300blk game already, I'd be less interested in this idea. But even otherwise, I figure I don't need to shoot a lot of it to be sufficiently proficient for my intended purposes, and I figure shooting .22lr and 5.56 AR's with the same manual of arms reduces the need to shoot a whole lot of 300blk.

If you get one, you'll want to shoot it. Take Shawn's little 300blk SBR. It's waaayyy too much fun to be a safe queen...

 

Of course you could cast with me or load your ammo with any of us...

 

Real question is why do you want one of these guns? Is it for novelty or SHTF?

Reasons:

1. Novelty: nothing more fun than new-to-me guns (well, aside from new-to-me women).

2. Away-from-home gun: I'm thinking it would make an awesome trunk gun (specifically in short-barrel form), especially if I'm farther away from home (I wouldn't put it in the trunk for short trips). My carry guns are tiny, so in a SHTF scenario where I'm too far away to make it home in a few minutes, having a firearm with more punch, larger mags, more effective distance and an optic is appealing.

3. SHTF: for urban SHTF scenarios, a short-barrel firearm that doesn't obliterate my hearing (or that of comrades) is appealing; specifically, I'm thinking of subsonic 300blk even w/o a suppressor.

 

Ammo cost and availability of ammo. 9 mm is easier to find. Why do you want either? SHTF? CQB? Home defense?

 

Keep in mind taking NFA items out of state is a PITA...



Unless we're talking pistol with the Sig support thing installed...

 

Ammo cost and availability of ammo. 9 mm is easier to find. Why do you want either? SHTF? CQB? Home defense?

Answered in the post just above yours.

 

Keep in mind taking NFA items out of state is a PITA...

Unless we're talking pistol with the Sig support thing installed...

Indeed we are.

Plus, I'd have options even if I went NFA and was traveling out of state:
1. Remove the can (so I'd have to use a handguard that didn't extend past the barrel to avoid accidentally BBQ'ing my support hand when I don't have a can threaded on)
2. Remove the SBR lower and put on a pistol lower with Sig brace

 

You're welcome to try my 9mm SBR and 300blk SBR. Both are fun but IMO, are just range toys.
300blk with no can cycling subs might get hinky. Supers are fine but the subs may need a can.

 

You're welcome to try my 9mm SBR and 300blk SBR. Both are fun but IMO, are just range toys.

Thanks. Why do you think they are just range toys? See post #9 for my intended purposes - am I not thinking about this correctly?

300blk with no can cycling subs might get hinky. Supers are fine but the subs may need a can.

Even a 10" barrel with subsonic 300blk?

 

Reasons:

1. Novelty: nothing more fun than new-to-me guns (well, aside from new-to-me women).

2. Away-from-home gun: I'm thinking it would make an awesome trunk gun (specifically in short-barrel form), especially if I'm farther away from home (I wouldn't put it in the trunk for short trips). My carry guns are tiny, so in a SHTF scenario where I'm too far away to make it home in a few minutes, having a firearm with more punch, larger mags, more effective distance and an optic is appealing.

3. SHTF: for urban SHTF scenarios, a short-barrel firearm that doesn't obliterate my hearing (or that of comrades) is appealing; specifically, I'm thinking of subsonic 300blk even w/o a suppressor.

1. Novelty hard to argue with that.

2. Travelling with anything short (NFA) as a rifle requires ATF written approval, a pistol may not be a pistol in other states, many states do not recognize AR platform pistols as true pistols and you have to transport them like a rifle. As far as a get home gun, if I am more than a hour or so away I would consider something like a true AR 5.56 with ammo, neither a 9mm or a 300 blk is going to do much good past 100 yards and honestly a practiced shooter should be able to hit at 100 yards with some accuracy with their pistol. If they cannot do that then they need more practice. Also accuracy out of short 5.56, less than 14" starts to drop off real fast and add a pistol stock to it and you are back to 100 yards accuracy

3. 300 subs or 9 mm is still going to do hearing damage without a suppressor.

blackout as a SHTF is a bad idea, the whole point of a SHTF gun is to have something that has a lot of ammo readily available. you want something you can easy acquire (steal or take) so that is usually NATO rounds, 9mm, 45acp, 5.56, 7.62x51

 

You're welcome to try my 9mm SBR and 300blk SBR. Both are fun but IMO, are just range toys.
300blk with no can cycling subs might get hinky. Supers are fine but the subs may need a can.

I disagree for range toys.

the 9mm SBR is a great CQB round would choose that over a 5.56 or a 300 blk super for use in a home or building.

the 300 blk was developed as a subsonic hunting / cqb round. It again is good in close range but ammo availability an issue.

 

Thanks. Why do you think they are just range toys? See post #9 for my intended purposes - am I not thinking about this correctly?

Even a 10" barrel with subsonic 300blk?

IMO, BBL length isn't the issue. There just isn't much powder, which equals gas...and
gas makes the gun cycle. Granted, i've only used H110 &LIL gun in my AR.
AA1680 might change everything. Won't know until i can find some.
I think Shawn drilled out his gas port to cycle subs better. Am i right Shawn?

 

I disagree for range toys.

the 9mm SBR is a great CQB round would choose that over a 5.56 or a 300 blk super for use in a home or building.

the 300 blk was developed as a subsonic hunting / cqb round. It again is good in close range but ammo availability an issue.

Ref the 9mmSBR: You've obviously never shot my 9mm SBR. ;-)

 

IMO, BBL length isn't the issue. There just isn't much powder, which equals gas...and
gas makes the gun cycle. Granted, i've only used H110 &LIL gun in my AR.
AA1680 might change everything. Won't know until i can find some.
I think Shawn drilled out his gas port to cycle subs better. Am i right Shawn?

No I bought a Noveske barrel which was designed for subs unsuppressed and suppressed.

 

Ref the 9mmSBR: You've obviously never shot my 9mm SBR. ;-)

I am being dense? What do you mean? My 9mm runs like a clock both suppressed and unsuppressed but it is only a 5in barrel.

 

I am being dense? What do you mean? My 9mm runs like a clock both suppressed and unsuppressed but it is only a 5in barrel.

i'm saying my 9mm SBR doesn't run well at the moment. Short strokes a bit.
Its a sore subject.

 

No I bought a Noveske barrel which was designed for subs unsuppressed and suppressed.

Well there you have it. Just have to use a barrel/gas port designed to handle subs unsuppressed.

 

the 9mm SBR is a great CQB round would choose that over a 5.56 or a 300 blk super for use in a home or building.

I presume this is due to loudness? If so, why not compare 9mm to 300 blk subsonic?

 

1. Novelty hard to argue with that.

2. Travelling with anything short (NFA) as a rifle requires ATF written approval, a pistol may not be a pistol in other states, many states do not recognize AR platform pistols as true pistols and you have to transport them like a rifle. As far as a get home gun, if I am more than a hour or so away I would consider something like a true AR 5.56 with ammo, neither a 9mm or a 300 blk is going to do much good past 100 yards and honestly a practiced shooter should be able to hit at 100 yards with some accuracy with their pistol. If they cannot do that then they need more practice. Also accuracy out of short 5.56, less than 14" starts to drop off real fast and add a pistol stock to it and you are back to 100 yards accuracy

3. 300 subs or 9 mm is still going to do hearing damage without a suppressor.

blackout as a SHTF is a bad idea, the whole point of a SHTF gun is to have something that has a lot of ammo readily available. you want something you can easy acquire (steal or take) so that is usually NATO rounds, 9mm, 45acp, 5.56, 7.62x51

2. Thanks for the points re: how other states might treat a pistol AR. Not sure why you think 300blk is limited to 100 yards?? IIRC, accuracy out of 300 blk does not drop off with shorter barrels as quickly as it does with 5.56.

3. Sure, 300 subs will do damage, but the amount by which you exceed the hearing safe level matters. 5.56 will do even more damage. Especially when comparing 300 subs unsuppressed vs. 5.56 unsuppressed out of a short barrel.

Your SHTF point is well taken. I should have clarified. The idea would be that it would be a supplement to, not a replacement for, a 5.56 rifle. Yes, I won't have 300 subs stockpiled the way I do 5.56, but if I'm having to go through thousands of rounds of 300 subs in CQB SHTF situations, I'm probably long dead anyway.

 

I presume this is due to loudness? If so, why not compare 9mm to 300 blk subsonic?

Not really loudness, more on over penetration. 9mm is going to go a much shorter distance than a 5.56. Even in modern home construction. Both will over penetrate but a 147 grain 9mm is going to go a much shorter distance. I still do not see 300 blk as a viable SHTF or CQB just because of the cost and lack of availability of ammo.