147 gr 9mm

[mriddick]

Are all 147gr 9mm (9x19) loads considered subsonic?

[O.S.O.K.]

I would expect them all to be yes. Even at +P they shouldn't be anywhere near 1100.

[circuits]

Out of a pistol length barrel, they should stay subsonic.

[Schuetzenman]

Yes by and large they would be even in an Uzi.

[HDR]

I would expect them all to be yes. Even at +P they shouldn't be anywhere near 1100.

1129.3...3 at 70F and at sea level.

770 mph X 5280 feet per mile = 4,065,600 ft. per hour. Divided by 60 = 767760 feet per minute, divided by 60 = 1129.3333 feet per second.

[Gunreference1]

The exception. It must be loaded extremely hot!

http://www.buffalobore.com/index.php?l=product_detail&p=120

Steve

[mriddick]

The exception. It must be loaded extremely hot!

http://www.buffalobore.com/index.php?l=product_detail&p=120

Steve
Math just got pimp slapped by reality..... :) (nah my load isn't that stuff)

[matshock]

The exception. It must be loaded extremely hot!

http://www.buffalobore.com/index.php?l=product_detail&p=120

Steve

Huh- I bet that would hit more than 1300 FPS out of my sub 2000. Nice.

[old Grump]

My ammo gives me 1020 fps out of a Browning but it's the most accurate of all the 9 MM. My 110 and 124 stuff is practice ammo and the 147 is for serious, velocity be damned. Getting a hit counts for more than the little bullet going real fast in my dinosaur philosophy. Must be why I am a 1911 45 caliber ACP fan. You take the Ferrari, I'll take the Big Mack truck.

[O.S.O.K.]

1129.3...3 at 70F and at sea level.

770 mph X 5280 feet per mile = 4,065,600 ft. per hour. Divided by 60 = 767760 feet per minute, divided by 60 = 1129.3333 feet per second.

Gotta figure varience - 30 fps would be normal in many loads. :) I just say 1100 fps to stay "good".

[Mark Ducati]

FWIW, I could never get my Trident 9 suppressor to cycle my G17 until I tried some ammo from "Alabama Ammo" and the specific 147gr is called "Special K".

[Tiredofit]

1129.3...3 at 70F and at sea level.

770 mph X 5280 feet per mile = 4,065,600 ft. per hour. Divided by 60 = 767760 feet per minute, divided by 60 = 1129.3333 feet per second.

Is 770mph a constant or does it vary with altitude/ barometric pressure/ temp?

[aliceinchains]

My ammo gives me 1020 fps out of a Browning but it's the most accurate of all the 9 MM. My 110 and 124 stuff is practice ammo and the 147 is for serious, velocity be damned. Getting a hit counts for more than the little bullet going real fast in my dinosaur philosophy. Must be why I am a 1911 45 caliber ACP fan. You take the Ferrari, I'll take the Big Mack truck.


I will take an order for the Big Mack truck.

[l921428x]

Is 770mph a constant or does it vary with altitude/ barometric pressure/ temp?

Everything varies with altitude, barometric pressure and temp.

[NewbieAKguy]

Sounds like a job for MythBusters!!!

[mriddick]

How about I wait till it gets alittle warmer and I'll just get out the chrono...

[NewbieAKguy]

How about I wait till it gets alittle warmer and I'll just get out the chrono...

But do you have a hot assistant like Carrie from Mythbusters?

http://t3.gstatic.com/images?q=tbn:ANd9GcT2Ofn2mocJO_ldwDKBZCyq_EvgJva05 LQlxds5IEzt1BC6PcBs&t=1

[FunkyPertwee]

Hot nerd assistants aside, mythbusters kinda sucks. They don't seem very scientific.

[az_paul]

I roll my own for use with the suppressor and believe it's under 1000fps.

[GunBum]

I have a hard time with 147gr bullets going supersonic, but I am shooting at anywhere between 4500 feet and 10,000 feet above sea level. The problem is even worse in the summer when it is HOT.