From all my previous testing making these bullets I really thought the 9/mm drawn case would have to be trimmed. When making my last small batch of 100, 125/gn bullets using cases trimmed to 0.600", I just decided to seat the core in a full-length case 0.800" long. I just figured when the core is seated there is over 0.200" of an inch of jacket above the core and it would just get crushed in the point forming operation. The one picture shows how far down the core is seated.
I didn't expect the end result, not what I expected. The finished bullets all came out with a very uniform finished point. The excess case length actually looks like it gets rolled back inside the case. The finished bullet is fully jacketed. From this last test, I will not need to further trim any 9/mm cases to make these bullets. To make a 1000 pc lot would now take about ten hours like all the other calibers I now make. If I had to trim the cases, and debur them would add an additional twenty plus hours, something I did not want to do.
The other pictures show the finished 125/gn bullets and a cross section of how they fill out. The last picture shows how a 9/mm and a 357/Sig finished round would look. Lastly, I don't think you could make these on a manual press. I'm making these on a hydraulic press with the pressure set to obtain 3.1/TONS of force. I'm not sure what the breaking point of a standard 7/8-14 swage die is. Using 1-1/2" H-Type dies I don't see me every damaging one.
Because the die set is made for a 357 bullet I may have to run them through a 0.355"-0.566" sizing die. I would first load a small batch to see how they shoot primarily in my 357/Sig. Since the jackets are brass and softer than copper they probably will shoot just fine. I will find out in the weeks ahead.
Here are the end results and I do not need to do any further testing to see what will and what will not work.
9/mm annealed drawn case to 0.357" x 0.800" long
Sorted this batch, average case weight = 61.0/gn
Swaged cores = 64.0/gn
Standard Point die used one operation, not repointed
Finished bullet weight = 125/gn
Finished bullet length = 0.625"
Pressure required = 3.1/Tons Force
9/mm finished cartridge length = 1.060" maximum O.A.L. = 1.169"
357/Sig finished cartridge length = 1.140" maximum O.A.L. = 1.140"