turbo1889
357 LNAM
On the drawing board, done up in CAD, and the calculations done but havn't decided to actually build it yet or not.
To be used in the Glock model 20 with a custom replacement barrel and possibly a full long slide (LS) conversion project. My 357-LNAM (Long Neck Auto Magnum) flanked on either side by competing cartridges. Basically just a 357-Sig. with the neck extended to match the length of 10mm brass. Would work in the 10mm G-20 magazines (and for that matter any other 10mm magazine) a lot better then the 357-Sig. (which is too short and rattles back and forth and messes up the stack alignment) with the additional benefits including much better neck tension combined with better case capacity since the bullet would not protrude into the powder area. The already existing cartridge which could be considered as directly competing with my design is the 9x25-Dillion which has developed a reputation for having even worse neck tension issues then the 357-Sig. and offers only a marginal (approx 6%) powder capacity advantage over my 357-LNAM set-up with the additional benefit that a gun chambered for such a 357-LNAM Wildcat could still chamber and fire the 357-Sig. cartridge with complete safety provided the chamber was cleaned before switching back to 357-LNAM rounds (to prevent neck pinching from heavy fowling of the exposed neck area from firing the shorter necked 357-Sig. cartridge). In either case my 357-LNAM round would have an increase in case capacity of 0.19cc added on to the 1.27cc case capacity of the 357-Sig. which although still not touching the 1.75cc case capacity of the 357-mag and falling in at slightly less then the 1.55cc case capacity of the 9x25-Dillion does offer an improvement towards matching 357-mag ballistic capabilities beyond what the 357-Sig. is capable of while offering a vast improvement in neck tension and thus potentially the consistency and accuracy of the cartridge.
Obviously plenty of potential for cast boolits as well; probably have to stick to designs with a GC though. I don't think PB or BB would work very well since a regular 9x19 can be troublesome for lead boolits without using a GC and this would be an even more intense cartridge.
357 LNAM
On the drawing board, done up in CAD, and the calculations done but havn't decided to actually build it yet or not.
To be used in the Glock model 20 with a custom replacement barrel and possibly a full long slide (LS) conversion project. My 357-LNAM (Long Neck Auto Magnum) flanked on either side by competing cartridges. Basically just a 357-Sig. with the neck extended to match the length of 10mm brass. Would work in the 10mm G-20 magazines (and for that matter any other 10mm magazine) a lot better then the 357-Sig. (which is too short and rattles back and forth and messes up the stack alignment) with the additional benefits including much better neck tension combined with better case capacity since the bullet would not protrude into the powder area. The already existing cartridge which could be considered as directly competing with my design is the 9x25-Dillion which has developed a reputation for having even worse neck tension issues then the 357-Sig. and offers only a marginal (approx 6%) powder capacity advantage over my 357-LNAM set-up with the additional benefit that a gun chambered for such a 357-LNAM Wildcat could still chamber and fire the 357-Sig. cartridge with complete safety provided the chamber was cleaned before switching back to 357-LNAM rounds (to prevent neck pinching from heavy fowling of the exposed neck area from firing the shorter necked 357-Sig. cartridge). In either case my 357-LNAM round would have an increase in case capacity of 0.19cc added on to the 1.27cc case capacity of the 357-Sig. which although still not touching the 1.75cc case capacity of the 357-mag and falling in at slightly less then the 1.55cc case capacity of the 9x25-Dillion does offer an improvement towards matching 357-mag ballistic capabilities beyond what the 357-Sig. is capable of while offering a vast improvement in neck tension and thus potentially the consistency and accuracy of the cartridge.
Obviously plenty of potential for cast boolits as well; probably have to stick to designs with a GC though. I don't think PB or BB would work very well since a regular 9x19 can be troublesome for lead boolits without using a GC and this would be an even more intense cartridge.