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Posted: 11/12/2003 4:01:00 AM EDT
The shooting show had 460 Rowland uppers that used greasegun or Uzi mags, but sold out.

Any clue as to whether this was just a 45acp. reamed to 460, or are there other differences?

Gotta love the concept.

Any help appreciated.
Thanks in advance.

Travis F.
Link Posted: 11/12/2003 6:04:45 AM EDT
I think the only difference between a 45acp and a 460 Rowland is the length. Kinda like a 10mm/40S&W and a 38/357. That's what a dealer at a funshow told me. Of course the pressure is greater in the 460 Rowland... J
Link Posted: 11/12/2003 5:54:56 PM EDT
The difference is case length. It is basically like 38 special and 357. I have a S&W 625 6 shot revolver. Stainless (bead blasted dull) Night sights It started out 45acp. The cylinders were bored deeper. It is now 460 rowland and 45acp. Now, the problem is that before it was bored you could fire single loose 45acp round if you had too. But now you have to use a moon clip. My dad reloads 460 rowland. A 460 packs more punch then a 44mag. An example of .460 Rowland/CCU ballistics that can be expected. Bullet Weight Muzzle Velocety Power Factor 165 gr. 2052 fps 338 185 gr. 1940 fps 358 200 gr. 1700 fps 340 230 gr. 1648 fps 379 The AR style in 460 rowland would be cool, but I am not sure if it would be cost effective. To my knowledge there are not any MAJOR ammo makers for that caliber. Yes you can get CORBON and a couple other, but no FEDERAL, or other BIG ammo makers. [img]http://www.concealco.com/4ed_med_2.jpg[/img]
Link Posted: 11/12/2003 5:56:27 PM EDT
For more info on the 460 check here [url]http://www.concealco.com/460rowland.html[/url]
Link Posted: 11/14/2003 7:38:59 PM EDT
[Last Edit: 11/14/2003 7:44:15 PM EDT by qd4gtz]
I think I'll have to call "bullshit" on that claim of 1648fps with 230 bullet. That's 300fps over hodgdon's max load. Now I know the manufacturers can be a little conservation but come on. In addition, look at the case capacity of the 44 magnum vs. the 460 rowland. Ignoring the case web geometry, use 1/2*pi*r^2*l for the volume. for 44 magnum: r= .21475, l=1.285 for 460 rowland: r= .22575, l= .9605 volume of 44 magnum = .0931 cu. in. volume of 460 rowland = .0769 cu. in. In addition from the sierra reloading manual 24gr. H110 with a 240gr bullet gets 1750fps. Power factor 420.
Link Posted: 11/15/2003 11:55:44 AM EDT
Maybe I should of stated that the velocities listed above is being shot out of a carbine, not a pistol. THe corrected pistol data is NOSLER 185 JHP AA NO.7 -18.5 grains 1550 fps 38,800 1.250 IN. (Defense Load) AA NO.7 - 16.0 grains 1350 fps SPEER 200 JHP AA NO.7 - 18.0 grains 1495 fps 39,300 1.190 IN. HORNADY 230 XTP AA NO.7 - 15.8 grains 1349 fps 39,500 1.250 IN. sorry for the confusion. Still a hell of a round.
Link Posted: 11/15/2003 2:07:42 PM EDT
Now I'm embarrassed. The numbers I quoted for the 44 data are for a carbine as well. Duh. For the pistol data, 240gr bullet at 1400fps.
Link Posted: 11/16/2003 9:18:19 AM EDT
Sounds like a cool upper idea. It is very well do-able. As with other higher velocity rounds, a heavier buffer and spring may have to be used. An example would be the 357 Sig upper that Kurt makes...he suggets a stronger spring and I think a heavier buffer. Simple re-chambering a 45 ACP would work IMHO. The only upper in 45 ACP is from Oly though, so you choice of carbine uppers is limited, other then going custom making a Colt style.
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