The Firing Line Forums

Go Back   The Firing Line Forums > The Hide > The Art of the Rifle: General

Thread Tools
Old April 8, 2002, 07:08 PM   #1
Shootin' Shane
Senior Member
Join Date: December 27, 2000
Location: West TN
Posts: 122
Ballistics for .45acp from rifle barrel?

Does anyone know where I could find ballistic info for a .45 auto cartridge out of a rifle barrel? My brother just bought a HK USC .45, and we were curious how the .45acp preforms out of a 16 inch barrel. Or does an extra 11-12 inches of barrel even make much difference? The ammo websites I've checked only show pistol specs. Thanks, Shane
Shootin' Shane is offline  
Old April 8, 2002, 09:07 PM   #2
Senior Member
Join Date: February 23, 2000
Location: California USA
Posts: 4,534
Check the Mech Tech carbine website

They make a product that converts a 1911 into a .45 carbine. IMR, they have the numbers you want on their website. There is a significant gain in velocity and the trajectory is flat out to about 75 yards. The drop at 100 yards is about 6 inches.

Ledbetter is offline  
Old April 8, 2002, 10:24 PM   #3
Senior Member
Join Date: December 2, 2000
Location: Sydney
Posts: 538
Here's a couple of links to 2 online ballistic calculators that I find very useful -
Deadman is offline  
Old April 8, 2002, 10:41 PM   #4
Shootin' Shane
Senior Member
Join Date: December 27, 2000
Location: West TN
Posts: 122
Hey, thanks a lot, guys!
Shootin' Shane is offline  
Old April 8, 2002, 11:12 PM   #5
Junior member
Join Date: January 2, 2002
Location: Missouri
Posts: 902
Another resource

is Sierra's Rfle reloading manual (the new one anyway). Has .45 ACP load/velocity data developed using a 16.5" Marlin Mod.45. Close enough for gummint work, imho. This is what I use to do ballistics with my MechTech ccu.
trapshooter is offline  
Old April 9, 2002, 12:17 AM   #6
Dave T
Senior Member
Join Date: April 16, 2000
Location: Mesa, Arizona
Posts: 1,146
I got to borrow a Marlin Camp Carbine (16.5" barrel) for a while and got the following chronograph results:

WW Ball (230g) = 861 fps

Federal Hydra-Shok 230g = 978 fps

5.4g WW 231 behind a 225g cast bullet = 995 fps

This was from 50-150 fps faster than those same rounds delivered in a 5" Government Model.
RSVN '69-'71
Dave T is offline  
Old April 9, 2002, 12:36 AM   #7
Senior Member
Join Date: March 25, 2001
Location: USA
Posts: 511
Seems that low-pressure cartridge doesn't gain much from the longer bbl. However, the USC groups great at silly distances (say 200 yds) once you figure out the hold-off !
NRA Certified Pistol & Personal Protection Instructor
Gunsite 250/350/499
Archer1440 is offline  

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -5. The time now is 04:03 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2015 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent:
Contact Us
Page generated in 0.08855 seconds with 7 queries