Best cartridge for a “Long Barreled Pistol” possible SBR - Page 2

MarkCO · February 19, 2017, 11:50 AM

An AR pattern 10mm, gas operated, would be my choice based on the title of the OP thread.

But that does take some effort and money to get there. Maybe in a few years, there will be more.

AR9s, Glock fed, and KelTec Sub2000s are great options. Accurate, quiet, anyone can shoot them well.

I played with short and long barreled .300BOs, and sold them all off. You can get better terminal performance with the 9mm than the .300BO. The 300BO has very few rounds that perform well for SD at sub-sonic velocities, and they are expensive as heck. The exoctic 9mm market is growing fast and I have been able to get over 2100 fps in my 9mm carbines as well as 160 grain solids at 1050 fps. The plinker ammo is cheaper too.

Overkill777 · February 19, 2017, 11:59 AM

"You can get better terminal performance with the 9mm than the .300BO. The 300BO has very few rounds that perform well for SD at sub-sonic velocities, and they are expensive as heck."

I'm not a proponent for 300 blackout, I don't even own one. Your statement may be true when comparing subsonics only, but the advantage to 300 blackout is you can go supersonic with just a mag change. 300 blackout supersonic is a rifle caliber and blows 9mm away in terminal performance.

MarkCO · February 19, 2017, 12:11 PM

Yes, but supersonic 300BO rounds without a suppressor are MUCH more concussive than 9mm at supersonic.

Terminal performance, not as clear cut as you make it seem Overkill777. I have done a good bit of terminal performance evaluation with bonded 9mms pushed into the 1600 to 2100 fps range as well as the 110 and 125 300 BOs at 1700 to 2300 fps. When taking all things into account, there is not a whole lot of difference and some cases when the 9mm outperformed the 300BO and others where the 300BO outperformed the 9mm. There is enough in each to select the right bullet for the application.

Overkill777 · February 19, 2017, 01:42 PM

9mm at 2100 fps. Yeah, sure.

MarkCO · February 19, 2017, 07:42 PM

Put this in your 16" barreled 9mm and shoot it over a chronograph...

http://libertyammunition.com/product/civil-defense-9mm

Actually, not hard to get to 2100 fps with heavier bullets if you use the proper powder and load development.

Rich_357 · February 19, 2017, 11:05 PM

Stupid question but are the Hornady Black 556 SBR and the Law Enforcement 556 TAP SBR the same round? The ballistics are the same for the 11.5” barrel; maybe a difference in the projectile???

Law Enforcement 5.56 NATO 75 gr TAP® SBR
http://www.hornadyle.com/products/ri.../75-gr-tap-sbr

5.56 NATO 75 gr Interlock® HD SBR™ Black™
http://www.hornady.com/store/5.56-NA...-HD-SBR-Black/

Rich_357 · February 20, 2017, 10:57 PM

This is going to be a fun weekend…

I don’t have the cash right now but I’d eventually like to pick up a nice chronograph and a DB level monitor. Right now, I can afford a scale and my feed back. :P

Here's to range day!!!

February 19, 2017, 11:50 AM	#26
MarkCO Senior Member Join Date: October 21, 1998 Location: Colorado, USA Posts: 4,308	An AR pattern 10mm, gas operated, would be my choice based on the title of the OP thread. But that does take some effort and money to get there. Maybe in a few years, there will be more. AR9s, Glock fed, and KelTec Sub2000s are great options. Accurate, quiet, anyone can shoot them well. I played with short and long barreled .300BOs, and sold them all off. You can get better terminal performance with the 9mm than the .300BO. The 300BO has very few rounds that perform well for SD at sub-sonic velocities, and they are expensive as heck. The exoctic 9mm market is growing fast and I have been able to get over 2100 fps in my 9mm carbines as well as 160 grain solids at 1050 fps. The plinker ammo is cheaper too. __________________ Good Shooting, MarkCO www.CarbonArms.us

February 19, 2017, 12:11 PM	#28
MarkCO Senior Member Join Date: October 21, 1998 Location: Colorado, USA Posts: 4,308	Yes, but supersonic 300BO rounds without a suppressor are MUCH more concussive than 9mm at supersonic. Terminal performance, not as clear cut as you make it seem Overkill777. I have done a good bit of terminal performance evaluation with bonded 9mms pushed into the 1600 to 2100 fps range as well as the 110 and 125 300 BOs at 1700 to 2300 fps. When taking all things into account, there is not a whole lot of difference and some cases when the 9mm outperformed the 300BO and others where the 300BO outperformed the 9mm. There is enough in each to select the right bullet for the application. __________________ Good Shooting, MarkCO www.CarbonArms.us

February 19, 2017, 07:42 PM	#30
MarkCO Senior Member Join Date: October 21, 1998 Location: Colorado, USA Posts: 4,308	Put this in your 16" barreled 9mm and shoot it over a chronograph... http://libertyammunition.com/product/civil-defense-9mm Actually, not hard to get to 2100 fps with heavier bullets if you use the proper powder and load development. __________________ Good Shooting, MarkCO www.CarbonArms.us

February 19, 2017, 11:59 AM	#27
Overkill777 Senior Member Join Date: January 4, 2015 Posts: 267	"You can get better terminal performance with the 9mm than the .300BO. The 300BO has very few rounds that perform well for SD at sub-sonic velocities, and they are expensive as heck." I'm not a proponent for 300 blackout, I don't even own one. Your statement may be true when comparing subsonics only, but the advantage to 300 blackout is you can go supersonic with just a mag change. 300 blackout supersonic is a rifle caliber and blows 9mm away in terminal performance.

February 19, 2017, 01:42 PM	#29
Overkill777 Senior Member Join Date: January 4, 2015 Posts: 267	9mm at 2100 fps. Yeah, sure.

February 19, 2017, 11:05 PM	#31
Rich_357 Senior Member Join Date: February 28, 2016 Posts: 268	Stupid question but are the Hornady Black 556 SBR and the Law Enforcement 556 TAP SBR the same round? The ballistics are the same for the 11.5” barrel; maybe a difference in the projectile??? Law Enforcement 5.56 NATO 75 gr TAP® SBR http://www.hornadyle.com/products/ri.../75-gr-tap-sbr 5.56 NATO 75 gr Interlock® HD SBR™ Black™ http://www.hornady.com/store/5.56-NA...-HD-SBR-Black/

February 20, 2017, 10:57 PM	#32
Rich_357 Senior Member Join Date: February 28, 2016 Posts: 268	This is going to be a fun weekend… I don’t have the cash right now but I’d eventually like to pick up a nice chronograph and a DB level monitor. Right now, I can afford a scale and my feed back. :P Here's to range day!!!