308 SBR anyone?

[Sugar Land]

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[oldag]

found this post regarding bbl lengths and 308. I wish they had data for a 12.5" but 13.5" is close enough.

The Truth About Barrel Length, Muzzle Velocity and Accuracy - The Truth About Guns

readers digest version. Velocity starts off lower with 13.5" vs 16". 18", 20" etc, as expected, but accuracy out to 900 yards isn't compromised at all.

Good article. Thanks for the link.

 

[1slow01Z71]

found this post regarding bbl lengths and 308. I wish they had data for a 12.5" but 13.5" is close enough.

The Truth About Barrel Length, Muzzle Velocity and Accuracy - The Truth About Guns

readers digest version. Velocity starts off lower with 13.5" vs 16". 18", 20" etc, as expected, but accuracy out to 900 yards isn't compromised at all.

My buddy has an HK 12.5" 308 with a specwar and its actually a really nice setup. The specwar tames that beast pretty well. We shot it out to 750 with a 4x ACOG and had no problems keeping it on an IPSC silhouette once we got the dope dialed in. Definitely more optimal setups for long range but it did just fine being stretched on out there. Its seriously make me consider building a 308 SBR but 12.5" 308 doesn't do much more than building a 270AR off one of my existing stamped lowers.

 

[IXLR8]

It is just a fad... Next year it will be the longest baarrel you can get. There is no way I would ever fire a .308 in the house, and that is the most cited use, close quarters. There are better solutions IMHO.

The concussion from the blast of all of the unused powder may be useful. You wouldn't even need to hit your target.

 

[oldag]

Whew. Short barrel .308 in the house would have everyone thinking they needed to answer the phone for the next couple of months...

 

[1slow01Z71]

It is just a fad... Next year it will be the longest baarrel you can get. There is no way I would ever fire a .308 in the house, and that is the most cited use, close quarters. There are better solutions IMHO.

The concussion from the blast of all of the unused powder may be useful. You wouldn't even need to hit your target.

Who says an SBR is only good for CQB? Many people, including myself don't want to cart around a long ass gun for hunting. With the proper can its doesn't have any muzzle blast at all.

 

[Das Jared]

Who says an SBR is only good for CQB? Many people, including myself don't want to cart around a long ass gun for hunting. With the proper can its doesn't have any muzzle blast at all.

I've taken my aimpoint pro equipped 11.5" 5.56 sbr out to 450yds on steel silhouette targets, and that's me shooting. I agree with you, most people don't quite grasp barrel lengths

sent from jennifer lawrence's bedroom

 

[HKaltwasser]

I'm about to do two. I already have 150 or so mags for them.
V51 HK51 clone:

PTR K3p G3K clone:

 

[oldag]

The PTR 91 PDW (and similar PTR 51P PDW) are pretty solid and a blast to shoot (literally).

Adding a PWS muzzle brake got rid of most of the muzzle rise.

Took a little breaking in.

Add a Aimpoint Pro or similar, and at 25 yards you can put 60 rounds in one big hole.

The PTR 51P PDW comes ready to install a Sig brace (although the cap screws provided with the brace do not work, you have to use something a little shorter). Also has a rail welded on top (lacking in the PTR 91 PDW, but you can buy a bolt on).

Just a dirty cleanup after shooting...

 

[diesel1959]

yeah, the roller locks have always been dirty little girls . . . but they're so much fun to shoot.

 

[rushthezeppelin]

You know I was thinking about this yesterday. But when I think about it I always end up at a 300BLK.

Is there an argument for either in SBR?

Might have something to do with the caliber being made for SBRs

 

[IXLR8]

You could get a .308 bullpup with a 16" barrel that is the same overall length as your 8" SBR, and get good velocity out of it, and be a manageable size.

Shooting targets at 450yds, an SBR would not be my first choice for firearm...

My 16" barrel Tavor, is shorter than my 10" barrel MP5.

 

[1slow01Z71]

Meh, you can keep the shitty trigger, gas directly into your face, shitty mag changes and no prone shooting.

Theres no tavor equivalent 308 bullpup and I dont like rollerlocks.

 

[Powderhead]

Tag

 

[HKaltwasser]

The PTR 91 PDW (and similar PTR 51P PDW) are pretty solid and a blast to shoot (literally).

Adding a PWS muzzle brake got rid of most of the muzzle rise.

Took a little breaking in.

Add a Aimpoint Pro or similar, and at 25 yards you can put 60 rounds in one big hole.

The PTR 51P PDW comes ready to install a Sig brace (although the cap screws provided with the brace do not work, you have to use something a little shorter). Also has a rail welded on top (lacking in the PTR 91 PDW, but you can buy a bolt on).

Just a dirty cleanup after shooting...

I didn't have that problem. They got tight towards the bottom though. They're dirty, but they run like beasts.

 

[oldag]

In mine, the cap screws would not go but about halfway. Something inside was interfering. Glad yours worked ok.

They are a lot of fun, aren't they.

And a good truck gun if it ever hits the fan.

 

[HKaltwasser]

In mine, the cap screws would not go but about halfway. Something inside was interfering. Glad yours worked ok.

They are a lot of fun, aren't they.

And a good truck gun if it ever hits the fan.

Yep, mine will ride in my FJ scabbard.