Velocity for 8.5" 12ga.? [Archive] - Glock Talk

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emt1581
10-31-2011, 17:20
Looking at 1oz. Fosters and 00 Buck, what are some ballpark figures of what I can expect from an 8.5" barreled 12ga?

Thanks

-Emt1581

NG VI
10-31-2011, 18:07
1000ish feet per second.

No really, they don't lose nearly as much speed as you'd think.

emt1581
10-31-2011, 18:28
1000ish feet per second.

No really, they don't lose nearly as much speed as you'd think.

Woah really? Have you chrono'd it? I can't find any related charts online.

Thanks

-Emt1581

NG VI
10-31-2011, 23:18
Nah, just remembering to the best of my ability based on some old threads about the 14" and Serbus. The 14" guns lost very, very little velocity compared to the 18.5/20" guns, so my guess is full-power slugs or buck, the stuff rated 15-1600 feet per second, is probably still safely over a thousand out of a, 8.5".


Keep looking for real information though, I'm just giving you my honest best recollective abilities.

Usually I'm pretty good with numbers.

emt1581
11-01-2011, 04:59
Nah, just remembering to the best of my ability based on some old threads about the 14" and Serbus. The 14" guns lost very, very little velocity compared to the 18.5/20" guns, so my guess is full-power slugs or buck, the stuff rated 15-1600 feet per second, is probably still safely over a thousand out of a, 8.5".


Keep looking for real information though, I'm just giving you my honest best recollective abilities.

Usually I'm pretty good with numbers.


Oh ok. Yeah like I said there is no info I can find anywhere online for any SBS or AOW.

Thanks

-Emt1581

NG VI
11-01-2011, 08:11
I checked Ballistics By The Inch before I remembered what a pain in the ass for those guys doing an inch by inch shotgun velocity test would be for the short barreled section.

NG VI
11-01-2011, 08:51
http://www.thehighroad.org/archive/index.php/t-253202.html


http://www.ar15.com/archive/topic.html?b=6&f=17&t=328585

http://forum.saiga-12.com/index.php?/topic/19103-barrel-length-vs-velocity/

emt1581
11-01-2011, 17:49
I read through the links. I can accept that kinda power. It's still a one shot stopper.

Thanks

-Emt1581

NG VI
11-03-2011, 00:22
Yeah, it's still an ounce or more of lead being put out in a single go, and fast enough that no one could say with a straight face that it won't be an effective piece of medicine.

vafish
11-04-2011, 18:42
http://www.thehighroad.org/archive/index.php/t-253202.html


http://www.ar15.com/archive/topic.html?b=6&f=17&t=328585

http://forum.saiga-12.com/index.php?/topic/19103-barrel-length-vs-velocity/

None of those go below 12" and two of them are the same set of data.

I keep seeing references to a small arms review article that went down to 7" but none list the velocity.

If you look at the ballistics by the inch page you see that as the barrel gets shorter the velocity drop gets greater.

Since there is almost no velocity loss between 28" and 12" I'd bet you get a lot of loss as you drop shorter. I would expect to see something like the .32 ACP data at Ballistics by the inch where it holds at ~1,300 fps from 18" down to 8" Then drops from 1,300 fps to 900 fps in the next 6".

But even if it drops to 900 fps that's still an ounce of lead at the speed of a .45 ACP. Which is about twice the lead at the same speed.

But, when you think of it that way, why not just carry a .45 and double tap them.

emt1581
11-04-2011, 18:54
None of those go below 12" and two of them are the same set of data.

I keep seeing references to a small arms review article that went down to 7" but none list the velocity.

If you look at the ballistics by the inch page you see that as the barrel gets shorter the velocity drop gets greater.

Since there is almost no velocity loss between 28" and 12" I'd bet you get a lot of loss as you drop shorter. I would expect to see something like the .32 ACP data at Ballistics by the inch where it holds at ~1,300 fps from 18" down to 8" Then drops from 1,300 fps to 900 fps in the next 6".

But even if it drops to 900 fps that's still an ounce of lead at the speed of a .45 ACP. Which is about twice the lead at the same speed.

But, when you think of it that way, why not just carry a .45 and double tap them.

Because I don't plan to carry slugs unless going after a specific target/barrier. And I'll take 8 or 9 .32acp sized projectiles going the speed of a .45acp any day over one .45acp projectile.

-Emt1581