Recent Topics
Ford Pickup Front Wheel Bearings 2WD
by benjamming. 12/14/18 10:52 PM
GMC oil fill tube
by Redright9. 12/14/18 10:24 PM
Where do I buy Toto toilets? That has them!
by Vern_in_IL. 12/14/18 10:04 PM
Best filter cutter for the price?
by DONWATERS. 12/14/18 09:38 PM
5W-40 vs 10W-30 for a 2018 Audi A4
by jcr1293. 12/14/18 09:25 PM
Gave up on quadrajet electric choke today...
by leroyd92. 12/14/18 08:54 PM
2015 Odyssey - Which synthetic ATF?
by AngryScientist. 12/14/18 07:56 PM
Hyundai extended my warranty
by ernied. 12/14/18 07:33 PM
2016 Traverse 6350mi Schaeffers 9000 5W30
by chevman4life. 12/14/18 07:21 PM
Oil filter for Canadian winter
by Popsy. 12/14/18 06:11 PM
12-14-18 only! Irwin vise @ Menards. $99.99
by Kruse. 12/14/18 06:01 PM
10" Subwoofer - $6.52 Each
by Greg L. 12/14/18 05:31 PM
Finding 507.00 spec oil
by sloinker. 12/14/18 05:31 PM
New Tires for the Old Chevy!
by dogememe. 12/14/18 05:09 PM
Back to Basics II
by MolaKule. 12/14/18 04:31 PM
"SG(+)" 15w40 or better oil 1987 BBC 454
by F239141. 12/14/18 03:52 PM
All Mazda 3’s have bad OCV’s?
by buster. 12/14/18 03:44 PM
Newest Members
NEKGuy, Deltafaatl, wsalopek, jcr1293, maxwellk
66684 Registered Users
Who's Online Now
37 registered members (CKN, Blkstanger, ammowaster, 2strokeNorthstar, aquariuscsm, 3 invisible), 1,028 guests, and 46 spiders.
Key: Admin, Global Mod, Mod
Forum Statistics
Forums67
Topics295,090
Posts4,927,623
Members66,684
Most Online2,553
Oct 27th, 2018
Donate to BITOG
Previous Thread
Next Thread
Print Thread
Hop To
Page 1 of 3 1 2 3
Converting .45 ACP 1911 to .460 Rowland #4617762
12/29/17 12:09 PM
12/29/17 12:09 PM
Joined: Jul 2012
Posts: 2,273
Nashville, TN via Memphis
john_pifer Offline OP
john_pifer  Offline OP
Joined: Jul 2012
Posts: 2,273
Nashville, TN via Memphis
I'm sure most of y'all have heard of this, but if you haven't, it's a conversion that's available for 1911s, Glocks and Springfield XDs that gives you .44 MAG-like power levels out of a pistol chambered for .45 ACP.

The .460 Rowland cartridges do this by almost doubling the chamber pressure of standard .45 ACP, but the ported or compensated barrel makes it safe to shoot in a standard .45 ACP gun by momentarily delaying the opening of the slide in order to vent the excess gas pressure. Power gains over, say, 10mm Auto, are substantial.

The round overall length is the same length as .45 ACP, though the case is a bit longer.

The compensated barrel also actually reduces muzzle flip when compared to standard .45 ACP. It works very well due to the high pressure of the .460 Rowland round, as evidenced by watching the video of Sootch00 shooting his .460 Rowland-converted Colt vs. a standard .45 ACP 5" barreled handgun:



I've been thinking about getting a conversion kit for my Dan Wesson 1911. It would be $332 plus $25 for a stainless compensator, since my DW is stainless.

Any of y'all done the .460 Rowland conversion?


16 WRX - PPPP
07 Tacoma V6 - M1 EP 5W-30, Fram Ultra, 10K OCIs, 198K
07 Yamaha R1 - Rotella T6 5W-40, Bosch 3300
07 Yamaha YZ-250, Klotz, Rotella

Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4617798
12/29/17 01:05 PM
12/29/17 01:05 PM
Joined: Mar 2014
Posts: 3,477
NJ
Leo99 Offline
Leo99  Offline
Joined: Mar 2014
Posts: 3,477
NJ
I use my .45 as my home defense gun. It's fine just the way it is. Maybe if I had multiple .45 pistols I'd consider a conversion but probably not even then. .45 is plenty powerful enough for me.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
2004 Corolla 125,000 miles
2004 Rav4 370,000 miles
2015 Camry 70,000 miles
Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4617808
12/29/17 01:24 PM
12/29/17 01:24 PM
Joined: Dec 2016
Posts: 7,171
Waco, TX
Linctex Online content
Linctex  Online Content
Joined: Dec 2016
Posts: 7,171
Waco, TX
Originally Posted By: john_pifer
Power gains over, say, 10mm Auto, are substantial.


I guess the concept is lost on me.
I think 10mm is overkill for most any handgun use.

For big game hunting in Montana, I did use to use my Ruger .44 mag, though.
I just never felt like I needed a semi-auto with that power.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4617844
12/29/17 02:01 PM
12/29/17 02:01 PM
Joined: Jul 2012
Posts: 2,273
Nashville, TN via Memphis
john_pifer Offline OP
john_pifer  Offline OP
Joined: Jul 2012
Posts: 2,273
Nashville, TN via Memphis
I guess its similat to owning a powerful automobile. If you have to ask why?, then its not for you.

And then there are those of us whose immediate reaction is, THATS FREAKING AWESOME! I WANT ONE!!


16 WRX - PPPP
07 Tacoma V6 - M1 EP 5W-30, Fram Ultra, 10K OCIs, 198K
07 Yamaha R1 - Rotella T6 5W-40, Bosch 3300
07 Yamaha YZ-250, Klotz, Rotella

Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4617902
12/29/17 03:39 PM
12/29/17 03:39 PM
Joined: Sep 2010
Posts: 7,485
S California
OneEyeJack Offline
OneEyeJack  Offline
Joined: Sep 2010
Posts: 7,485
S California
Just do it. Life's too short to worry about it. It's a good conversion if you are comfortable with the increased power. It's really not that big of a deal.

Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4617949
12/29/17 04:44 PM
12/29/17 04:44 PM
Joined: Mar 2015
Posts: 5,159
Glendale, Arizona
billt460 Offline
billt460  Offline
Joined: Mar 2015
Posts: 5,159
Glendale, Arizona
Originally Posted By: john_pifer
The .460 Rowland cartridges do this by almost doubling the chamber pressure of standard .45 ACP, but the ported or compensated barrel makes it safe to shoot in a standard .45 ACP gun by momentarily delaying the opening of the slide in order to vent the excess gas pressure.


This is the part I'm not getting. Going by the gun in the photo, by the time the bullet reaches the compensator, it would have been out of the barrel on a standard 5" 1911. So where is the "delayed" part coming from? I can't see that system being any less hard on the gun. Especially if it's running over double the chamber pressure of a standard .45 ACP. As fine of a gun as the 1911 is, it's not "Magnumized". Even the .38 Super was hard on it when it first came out.

I remember when Colt first introduced the 10 MM Delta Elite. They had issues with slides cracking on several guns. I don't know what they did to fix it. If in fact they did anything. This was back when the 10 MM first came out, and was loaded hot. Perhaps the problem was self correcting when all the ammo makers started loading down the 10 MM to the anemic levels it now enjoys. Same with the .38 Super. That cartridge is loaded to nowhere near the power levels it was when it came out in the 30's.

Re: Converting .45 ACP 1911 to .460 Rowland [Re: billt460] #4617999
12/29/17 05:19 PM
12/29/17 05:19 PM
Joined: Jul 2012
Posts: 2,273
Nashville, TN via Memphis
john_pifer Offline OP
john_pifer  Offline OP
Joined: Jul 2012
Posts: 2,273
Nashville, TN via Memphis
Originally Posted By: billt460
Originally Posted By: john_pifer
The .460 Rowland cartridges do this by almost doubling the chamber pressure of standard .45 ACP, but the ported or compensated barrel makes it safe to shoot in a standard .45 ACP gun by momentarily delaying the opening of the slide in order to vent the excess gas pressure.


This is the part I'm not getting. Going by the gun in the photo, by the time the bullet reaches the compensator, it would have been out of the barrel on a standard 5" 1911. So where is the "delayed" part coming from? I can't see that system being any less hard on the gun. Especially if it's running over double the chamber pressure of a standard .45 ACP. As fine of a gun as the 1911 is, it's not "Magnumized". Even the .38 Super was hard on it when it first came out.

I remember when Colt first introduced the 10 MM Delta Elite. They had issues with slides cracking on several guns. I don't know what they did to fix it. If in fact they did anything. This was back when the 10 MM first came out, and was loaded hot. Perhaps the problem was self correcting when all the ammo makers started loading down the 10 MM to the anemic levels it now enjoys. Same with the .38 Super. That cartridge is loaded to nowhere near the power levels it was when it came out in the 30's.


Im not sure, Bill. I also wondered how it is doing it. Maybe the weight? Ill have to do some more research.

I know the Rowland Company says that 1911s that dont have heat-treated slides shouldnt be converted. They also have a list of 1911s they say are good to go. The Dan Wesson is on that list. And a quick search over on the DW section on the 1911 Forum revealed at least one person whos done it.


16 WRX - PPPP
07 Tacoma V6 - M1 EP 5W-30, Fram Ultra, 10K OCIs, 198K
07 Yamaha R1 - Rotella T6 5W-40, Bosch 3300
07 Yamaha YZ-250, Klotz, Rotella

Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4618042
12/29/17 05:58 PM
12/29/17 05:58 PM
Joined: Feb 2014
Posts: 2,449
[email protected] CZ firearm factory
Marco620 Offline
Marco620  Offline
Joined: Feb 2014
Posts: 2,449
[email protected] CZ firearm factory
Goodnight! I like 45 but apparently that aint enough for you. Dan Coonan makes 1911 in 38 Super,357, and 44mag.


15' Civic R18 200,090k 0w20 Redline/Archoil9200/TEIN/Eibach/Injen/Tanabe Sustec/Borla Exhaust!
Going for 238,900 milestone. My house to moon is 238,900 miles!
Son of a Navy Corpsman. Support veterans!


Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4618074
12/29/17 06:28 PM
12/29/17 06:28 PM
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
bigj_16 Offline
bigj_16  Offline
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
I remember about twenty five years ago, I went in my local gun store. The guy that worked there had just got a Grizzly .45 Win Mag in. Now, I am a pretty big, strong guy(and a lot younger back then smile ). I grabbed a hold of the slide like I would a 1911, and that sucker wouldn't move. I couldn't believe how hard I had to grip it, to rack the slide.

Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4618090
12/29/17 06:43 PM
12/29/17 06:43 PM
Joined: Feb 2013
Posts: 1,113
Prospect, KY
spk2000 Offline
spk2000  Offline
Joined: Feb 2013
Posts: 1,113
Prospect, KY
Ever look at the Magnum Research 44 Mag semi auto already built to handle the heavy loads and common ammo readily available in case you don't have the reloads ready when the zombie apocalypse begins.


96 Grand Marquis
01 Sable LS
02 Montero
Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4618099
12/29/17 06:54 PM
12/29/17 06:54 PM
Joined: Sep 2014
Posts: 1,489
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,489
Seattle-ish, WA
I almost did this about 15 years ago. I had custom Caspian that already had a slide cut in it for an integral ramped barrel. I bought a Clark .460 barrel and was about to fit it and then tool up to reload for it.

I decided a dedicated .44 Magnum was more suitable for my needs (bear gun), more reliable, and a good excuse to get a beautiful classic S&S .44 mag. So I sold the barrel and stepped away. But those were my needs and as a range gun and for the fun of it, it's a very compelling project.

Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4618101
12/29/17 06:55 PM
12/29/17 06:55 PM
Joined: Dec 2006
Posts: 4,220
Port Orange, Florida
Panzerman Offline
Panzerman  Offline
Joined: Dec 2006
Posts: 4,220
Port Orange, Florida
How available is the ammo?
According to most 1911 .45 Auto people a .45 Auto already has the stopping power of a Howtizer. This ought to really excited them. I d watch for the fine print like not liable for condition of your firearm.



2006 Dodge Ram 2500 Hemi 4x4
2016 Dodge Challenger Scat Pack
Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4618108
12/29/17 07:01 PM
12/29/17 07:01 PM
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
bigj_16 Offline
bigj_16  Offline
Joined: Jul 2017
Posts: 1,292
Douglas County, Colorado
The Underwood .460 Rowland 185 gr. load is listed at 1575 fps, and 1019 ME.

Re: Converting .45 ACP 1911 to .460 Rowland [Re: john_pifer] #4618111
12/29/17 07:02 PM
12/29/17 07:02 PM
Joined: Feb 2013
Posts: 1,113
Prospect, KY
spk2000 Offline
spk2000  Offline
Joined: Feb 2013
Posts: 1,113
Prospect, KY
Nice video. Very informative. I had a compensator like that for my Glock 21 which is 45 ACP and it would cause it to jam. Tried it for bowling pin shoots but the jamming was a real problem. It may have been the recoil reduction did not allow the slide to fully blowback. Also a friend had the Glock 20 10mm version and we were able to swap barrels and clips and shoot the other caliber just fine in each others gun.


96 Grand Marquis
01 Sable LS
02 Montero
Re: Converting .45 ACP 1911 to .460 Rowland [Re: Marco620] #4618142
12/29/17 07:29 PM
12/29/17 07:29 PM
Joined: Jul 2012
Posts: 2,273
Nashville, TN via Memphis
john_pifer Offline OP
john_pifer  Offline OP
Joined: Jul 2012
Posts: 2,273
Nashville, TN via Memphis
Originally Posted By: Marco620
Goodnight! I like 45 but apparently that aint enough for you. Dan Coonan makes 1911 in 38 Super,357, and 44mag.


Thing is, .45 ACP is not that powerful! Its a Low-pressure cartridge. Thats why when you shoot a .45, its not that sharp of a recoil. More of a shove...unlike, say, .40 S&W, which has the tendency to be sharp and snappy to many people.


16 WRX - PPPP
07 Tacoma V6 - M1 EP 5W-30, Fram Ultra, 10K OCIs, 198K
07 Yamaha R1 - Rotella T6 5W-40, Bosch 3300
07 Yamaha YZ-250, Klotz, Rotella

Page 1 of 3 1 2 3

BOB IS THE OIL GUY® Powered by UBB.threads™