|
November 21, 2009, 17:26
|
#1 |
|
Registered
FALaholic #: 3185 Join Date: May 2001
Location: Parris Island
Posts: 402
|
.460 Rowland in Kimber
Had long considered building one of these, but... resisted for the most of the past decade. Finally succumbed to temptation, and now I wish I have "succumbed" from the first.
http://www.clarkcustomguns.com/rowland.htm If you might have an appreciation for something more powerful than current commercially built .44 RemMag, in the M1911 platform, shoots softer than many .45acp rounds, hits REALLY hard, and is supremely accurate? You might consider one for yourself. http://www.johnnyrowland.com/product...and-cartridge/ Accuracy? Published data shows 0.8" at 25 yds, using Starline brass, Nosler 185grn HPs, AA7 powder (at max. loads  ). Over 1500 fps and 900 ft/lbs of (muzzle) energy, combined with that soft of recoil and extremely good accuracy? This one truly needs to be first hand experienced to believe...
|
|
|
|
November 21, 2009, 19:13
|
#2 |
|
Registered
FALaholic #: 5039 Join Date: Dec 2001
Location: Plains of Colorado
Posts: 894
|
Watch your internals if they're original, the MIM parts are not up to that kind of banging around.
__________________
Don't leave til tomorrow, that which you can gleefully blast into inexistence now. |
|
|
|
|
November 22, 2009, 01:44
|
#3 |
|
Registered
FALaholic #: 28149 Join Date: Apr 2007
Location: Sunny New Mexico
Posts: 1,277
|
Thump thump thump, another one joins the club.
I love my 460 kit. The accuracy amazed me as well. The recoil is not bad at all. Just keep a watch out for wear, mine hasn't noticeably worn at all after ~200 rounds, it's a PT1911, it fits and locks up well. I do load up to, but not above max. I don't shoot it a lot yet, I think I'm gonna need more brass... My brother says he always loads over max, I forgot what he told me but it was pretty shocking after just firing it with his loads. Recoil was not bad then, but definitely more. Wear would definitely be more too.
__________________
Every citizen should be a soldier. This was the case with the Greeks and Romans, and must be that of every free state. -Thomas Jefferson |
|
|
|
|
November 22, 2009, 10:54
|
#4 |
|
Registered
FALaholic #: 124 Join Date: Jul 2000
Location: Lancaster, PA USA
Posts: 8,500
|
Just where does the Rowland fit in with the .45 mag and all the other superized .45s? I investigated some a while back; but never followed up that far.
Izzit a dedicated upper or just a spring change? "Stretched" brass or std. length ; like using cut down and turned .308 cases?? Advantages? Disadvantages? Just got back from Johnnie's link. Pretty amazing cart . I think the carbines have definite possibilities; but I don;t think I'll be sending my brace of Colt's out for conversion... tho there *is* that [FUBAR] ODI that is going hungry lately!  Hmmmm?.....
__________________
All or Nothing! Senator McCarthy was right! and as always......FYB! Last edited by Deltaten; November 22, 2009 at 11:11. |
|
|
|
|
November 22, 2009, 12:29
|
#5 |
|
Old Fart
Bronze Contributor
FALaholic #: 18465 Join Date: Oct 2005
Location: Maine
Posts: 6,291
|
I'm doing a .45 Super. Not quite up to the Rowland, but definately more than .45 ACP
Bullet....................Wt.......dia.......OAL.. ......Powder.....charge......Primer........Vel.... ..Energy Hornady HP-XTP--.200---.451"--1.240"----HS7------14.2grs---Fed 150--- 1295---744 No new barrel required, just Super brass and recoil/trigger springs. (Po' folks Rowland) OK!, A mag for us cheapskates! 
__________________
Joe Biden for President. Last edited by MAINER; November 22, 2009 at 12:35. |
|
|
|
November 22, 2009, 16:10
|
#6 | |
|
Registered
FALaholic #: 1789 Join Date: Dec 2000
Location: Minneapolis, MN, USA
Posts: 1,364
|
Quote:
|
|
|
|
|
|
November 22, 2009, 16:13
|
#7 | |
|
Registered
FALaholic #: 1789 Join Date: Dec 2000
Location: Minneapolis, MN, USA
Posts: 1,364
|
Quote:
The .460 Rowland case is approximately 1/16" (.0625 inches (1.59 mm)) longer than a conventional .45 ACP. However, the overall cartridge length of the .460 Rowland is the same as the .45 ACP as the bullet is seated a bit deeper. This means the practical case capacity for both cartridges is identical. Case length for the .45 ACP is 0.898 inches (22.8 mm) and cartridge overall length is 1.275 inches (32.4 mm). Case length for the .460 Rowland is 0.955 inches (24.3 mm) and cartridge overall length is 1.275 inches (32.4 mm). The purpose of the extended case length is to prevent the high pressure .460 Rowland from being chambered in a standard firearm chambered for the low pressure .45 ACP, similar to the relationship between the .357 Magnum and the .38 Special. The overall cartridge length restriction imposed on both cartridges is established by the cartridge length capacity of the M1911 design. There are two key elements to the .460 Rowland concept. The first is a sharp increase in cartridge maximum pressure over the .45 ACP and .45 Super. Maximum Average Pressure is: 45 ACP (21,000 PSI), .45 ACP +P (23,000 PSI), .45 Super (28,000 PSI), .460 Rowland (40,000 PSI). The result of this pressure increase is a potential for 185-grain (12.0 g) bullets to achieve 1,500 ft/s (460 m/s) MV and 230-grain (15 g) bullets to achieve 1,340 ft/s (410 m/s). The second element, in regard to M1911 type autoloaders, is to dampen or reduce the velocity of the slide to a manageable levels. Conversions M1911 autoloaders converted for this cartridge require a compensator. The increase in slide velocity over a standard .45 ACP, or even a .45 Super round, cannot be properly controlled with an increase in recoil spring rate alone. A conversion requires a compensator to delay unlocking of the M1911 action until pressure has fallen to more manageable levels. Without a compensator, slide or frame failure would result. Modified M1911 type autoloaders theoretically can still fire .45 ACP cartridges; however, head spacing would not be at the case mouth, which is the proper location. Instead, the cartridge would be held in position by the gun's extractor. Additionally, the bullet would be unsupported in the forward 1/16" portion of the chamber, and the low pressure .45 ACP round would not reliably cycle the firearm. Since the conversion is not permanent, the pistol's owner is free to exchange their .45 ACP and .460 Rowland barrel assemblies. Some revolvers may be modified for use with the .460 Rowland. Typical examples are the Ruger Blackhawk and Smith & Wesson Model 25/625 that were originally chambered for the .45 ACP. The conversion of revolvers requires deepening the chambers, and is effectively permanent, unless the owner has a replacement cylinder fitted. |
|
|
|
|
|
November 22, 2009, 17:32
|
#8 | |
|
Registered
FALaholic #: 3185 Join Date: May 2001
Location: Parris Island
Posts: 402
|
Quote:
Accuracy... Don't want one of those "hats" that WEG is handing out, but... I am mostly constrained by the stock black-on-black Kimber sights. At 25 yds? Put ten rounds in the 10-ring. At fifty yards? Was busting clays, then pieces of clays, then slivers of clays. If you can see color? You can hit it. This one begs for better sights, and it is about to get a Leatherwood red dot optic... just gotta drill and tap the frame to fit the scope mount. I'll stick to max loads, thank you... My 500 S&W (and 500 grain bullets) is for the macho moment when I must investigate the outer limits of wrist abuse. This pistol? Were it not for the brake sitting at the end of the barrel, it shoots so softly that I might consider carrying the pistol in the CCW mode.  Have put a couple hundred .460 rounds through it; just finished loading up 1,000 with the Starline/Nosler/AA7 recipe. |
|
|
|
|
|
November 22, 2009, 17:38
|
#9 | |
|
Registered
FALaholic #: 3185 Join Date: May 2001
Location: Parris Island
Posts: 402
|
Quote:
Brass is pretty much proprietary Starline... don't know anyone else who is making it. And do NOT see a reason to cut up .308 brass, when the Starline ain't all that expensive. ALL the ammo that I have run through it, I loaded myself. Ain't a gonna pay $44/50 rounds, NO WAY!  As suggested by the other post... the .460 Rowland FAR out-powers the comparitively weak .45 Super, and the other flavors based on the .45acp. All I can say is... "Try it... you'll LIKE it!"
|
|
|
|
|
|
November 22, 2009, 17:43
|
#10 |
|
Registered
FALaholic #: 28149 Join Date: Apr 2007
Location: Sunny New Mexico
Posts: 1,277
|
Amen.
__________________
Every citizen should be a soldier. This was the case with the Greeks and Romans, and must be that of every free state. -Thomas Jefferson |
|
|
|
 |
| Thread Tools | |
| Display Modes | |
|
|
Linear Mode
