Post by Bo/CCPU Founder on Oct 15, 2015 14:16:34 GMT -6
Modern '.44 Magnum' Auto Search www.460rowland.com/about/ Conversions: www.460rowland.com/product-category/conversions/ Phone: 918.928.7460
Been looking into various cartridges for comparison. I would like to have something 'superior' to the 10mm in an auto handgun, as in higher velocity and greater ft. lbs. of power. The 10mm is also known for a very high slide velocity, resulting in a tremendous amount of 'backslap' (and recoil) to the shooter.
I originally was thinking of the .50 GI cartridge, a modernization of the .45 ACP, but when I looked at the charts, it was severely lacking in the ft. lbs. department, though otherwise a very interesting cartridge (around for about 10 years, now).
I saw nothing that could come even marginally close to S&W's 'king' .500 S&W revolver round, as expected. Just looked at that one for grins, really.
Moving downwards in the power department, I looked at .44 Magnum vs. the .460 Rowland and found it to be very close in both velocity and ft. lbs., as advertised by its inventor, Johnny Rowland.
When I went to his site and re-read (MANY years after the first time) his explanation of why the round was made, it all made perfect sense (again) and his comparison video sealed it.
DESIGN
The .460 Rowland case is approximately 1/16" longer than a conventional .45 ACP case but the overall cartridge length is the same, the bullet is simply seated more deeply. 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. This is similar to the relationship between the .357 Magnum and the .38 Special.
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 second is to damp or reduce the velocity of the slide in converted autoloading pistols to manageable levels. The first delivers magnum level performance and the second allows the cartridge to be easily and reliably fired from compact, light weight, high capacity, autoloading pistols.
I now plan to lobby Glock, S&W, Ruger, SIG, H&K, etc. (or anyone who'll perk up an ear) to give us a poly gun (you can already get it by buying or converting a 1911 to it) as I'm not a steel or 1911 guy. If you'd like to make the same comparisons I did, I'll supply you with the appropriate links to help speed things up. If you do so and reach the same or similar conclusions, I'd appreciate any extra voices of assistance in asking for a more updated (striker-type) piece to shoot it. Congrats to Johnny Rowland for his much far-sighted development work and hope to see his round spitting out the business end of a (standard, factory) poly piece one day in the not-to-distant future!
If something gets fouled up in that process (for one thing I haven't shown Johnny this proposal, yet) I will be looking into converting a poly gun to it as he details, below:
The first is a sharp increase in cartridge maximum pressure over the .45 ACP and .45 Super. The second is to damp or reduce the velocity of the slide in converted autoloading pistols to manageable levels. The first delivers magnum level performance and the second allows the cartridge to be easily and reliably fired from compact, light weight, high capacity, autoloading pistols.
High quality 1911 auto-loading pistols are manufactured by many different companies and tolerances vary with each manufacturer. As a result, adjusting recoil spring tensions and identifying specific magazines that works best in each individual gun have always been necessary to insure optimum performance from this 112 year old design. These same considerations are no less important when converting these guns to fire .460 Rowland cartridges. Once installed, tested and adjusted in this manner, a 1911/.460 Rowland Conversion will shoot .45 ACP, +P, Super and .460 Rowland cartridges accurately and reliably without ever having to revert to the factory barrel. Springfield XD / XDm, Glock 21 and Glock 30 auto-loaders and the SIG Sauer P220 are all made by a single manufacturer so similar adjustments are not often needed when these guns are converted to fire the .460 Rowland.
Links:
en.wikipedia.org/wiki/10mm_Auto
en.wikipedia.org/wiki/.50_GI
en.wikipedia.org/wiki/.500_S%26W_Magnum
en.wikipedia.org/wiki/.44_Magnum
en.wikipedia.org/wiki/.460_Rowland
Been looking into various cartridges for comparison. I would like to have something 'superior' to the 10mm in an auto handgun, as in higher velocity and greater ft. lbs. of power. The 10mm is also known for a very high slide velocity, resulting in a tremendous amount of 'backslap' (and recoil) to the shooter.
I originally was thinking of the .50 GI cartridge, a modernization of the .45 ACP, but when I looked at the charts, it was severely lacking in the ft. lbs. department, though otherwise a very interesting cartridge (around for about 10 years, now).
I saw nothing that could come even marginally close to S&W's 'king' .500 S&W revolver round, as expected. Just looked at that one for grins, really.
Moving downwards in the power department, I looked at .44 Magnum vs. the .460 Rowland and found it to be very close in both velocity and ft. lbs., as advertised by its inventor, Johnny Rowland.
When I went to his site and re-read (MANY years after the first time) his explanation of why the round was made, it all made perfect sense (again) and his comparison video sealed it.
Glock 30 in .460 Rowland
DESIGN
The .460 Rowland case is approximately 1/16" longer than a conventional .45 ACP case but the overall cartridge length is the same, the bullet is simply seated more deeply. 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. This is similar to the relationship between the .357 Magnum and the .38 Special.
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 second is to damp or reduce the velocity of the slide in converted autoloading pistols to manageable levels. The first delivers magnum level performance and the second allows the cartridge to be easily and reliably fired from compact, light weight, high capacity, autoloading pistols.
I now plan to lobby Glock, S&W, Ruger, SIG, H&K, etc. (or anyone who'll perk up an ear) to give us a poly gun (you can already get it by buying or converting a 1911 to it) as I'm not a steel or 1911 guy. If you'd like to make the same comparisons I did, I'll supply you with the appropriate links to help speed things up. If you do so and reach the same or similar conclusions, I'd appreciate any extra voices of assistance in asking for a more updated (striker-type) piece to shoot it. Congrats to Johnny Rowland for his much far-sighted development work and hope to see his round spitting out the business end of a (standard, factory) poly piece one day in the not-to-distant future!
If something gets fouled up in that process (for one thing I haven't shown Johnny this proposal, yet) I will be looking into converting a poly gun to it as he details, below:
The first is a sharp increase in cartridge maximum pressure over the .45 ACP and .45 Super. The second is to damp or reduce the velocity of the slide in converted autoloading pistols to manageable levels. The first delivers magnum level performance and the second allows the cartridge to be easily and reliably fired from compact, light weight, high capacity, autoloading pistols.
High quality 1911 auto-loading pistols are manufactured by many different companies and tolerances vary with each manufacturer. As a result, adjusting recoil spring tensions and identifying specific magazines that works best in each individual gun have always been necessary to insure optimum performance from this 112 year old design. These same considerations are no less important when converting these guns to fire .460 Rowland cartridges. Once installed, tested and adjusted in this manner, a 1911/.460 Rowland Conversion will shoot .45 ACP, +P, Super and .460 Rowland cartridges accurately and reliably without ever having to revert to the factory barrel. Springfield XD / XDm, Glock 21 and Glock 30 auto-loaders and the SIG Sauer P220 are all made by a single manufacturer so similar adjustments are not often needed when these guns are converted to fire the .460 Rowland.
Links:
en.wikipedia.org/wiki/10mm_Auto
en.wikipedia.org/wiki/.50_GI
en.wikipedia.org/wiki/.500_S%26W_Magnum
en.wikipedia.org/wiki/.44_Magnum
en.wikipedia.org/wiki/.460_Rowland