Some time ago I was involved into discussion in another forum about Keith bullets and their virtues. Of course, we all know how good Keith's bullets are. However, the truth is that, when heavy weights are required, LBT style is generally considered as a better choice. In that discussion a gentleman stepped in with proposal about modifying LBT by adding a small cone ahead of front driving band. The theory is that our ordinary revolvers (I am not talking about custom and semi-custom ones with line bored cylinders) have certain misalignment between cylinder chambers and barrel. When ordinary bullets hit the forcing cone, especially those with sharp shoulder, a small deformation on one side in bullet aligning process is inevitable, and when compounding with other inaccuracies that are beyond our control, our groups are opening up significantly. Now, by adding same cone angle on the bullet, contact surface with forcing cone is considerably increased and bullet deformation is reduced, bullet alignment is improved and as a result accuracy is improved. The best part of the story is that he himself made a mould to produce such bullets, and results are spectacular; with hard cast bullets equipped with gas check he was getting a rifle level of accuracy as far as 200 yds, even with standard SBH. He initially designed an made bullet with 11° cone, because (I assume) to use them in BFR, but it worked fine also in SBH.
Well, taking into account his experience, I started thinking why not to design bullet for Ruger revolvers specifically, and made a forcing cone on it 5°. After all, low angle forcing cone might have some benefits over 11°, since contact surface more than doubles.
Anyhow, here is my version of noted bullet for Rugers:
Nominal dia; .432
Weight using WW (with GC): 310 gr
Meplat dia: .340
Crimp to meplat: .445
OAL (with GC): .845
Please, take a look and let me know what do you think? If you feel that this could work, you can join us in preliminary discussion here http://castboolits.gunloads.com/showthread.php?t=135908 .
We would need to have at least 10 potential customers before starting group buy (GB) officially.
Well, taking into account his experience, I started thinking why not to design bullet for Ruger revolvers specifically, and made a forcing cone on it 5°. After all, low angle forcing cone might have some benefits over 11°, since contact surface more than doubles.
Anyhow, here is my version of noted bullet for Rugers:
Nominal dia; .432
Weight using WW (with GC): 310 gr
Meplat dia: .340
Crimp to meplat: .445
OAL (with GC): .845
Please, take a look and let me know what do you think? If you feel that this could work, you can join us in preliminary discussion here http://castboolits.gunloads.com/showthread.php?t=135908 .
We would need to have at least 10 potential customers before starting group buy (GB) officially.