The 460 Rowland will chamber 45 ACP, 45 Super and 460 Rowland. The 460 Rowland case is about 1/16" longer than 45 ACP or 45 Super to prevent it from being chambered in standard 45 ACP guns that can't handle the pressure. The overall length of all three cartridges is the same.
What are you going to use the gun for?
To convert a G30 to 460 Rowland it should be a matter of barrel, recoil spring and possibly a compensator if your barrel isn't ported. Shouldn't need to replace the entire upper to do the conversion, from what I've read. If you we're converting a G20 or 29 you would need a new upper due to the smaller breech face for the 10mm.
Glock 20, Colt Delta Elite, Sig 1911 Extreme, Norinco SKS-D, AK47, Marlin 795 .22LR, CZ 452 LH .22LR, Colt M4 .22LR, S&W M&P-15 Sport, Remington 700 SPS LH 300 Win Mag, Winchester 1300 Defender 12ga, Winchester 1300 Black Shadow 20ga
Last edited by AKRover; 09-22-2012 at 22:12..