Dale53
Member
oldman10mm;
Years ago, I had a similar problem, but with a rifle cartridge. This was a LONG time ago. I had some friends who were competing in Black Powder Cartridge Rifle Silhouette Matches. I decided to join them. It was suggested that a .40/65 had some advantages over the .45/70. Mostly because of less recoil. Prone shooting over sticks could be really hard on the shooter. Because of body position, the recoil was not absorbed by movement of the upper body, so it could be serious over a lot of shooting during a match.
There were a lot more 45/70 cases available, then, than 40/65 cases. The .45/70 was the parent case of the .40/65.
There was an issue though, similar to the issue you are having with the making of 10mm rimmed brass. When we ran the 45/70 cases through the 40/65 die, the area near the case head was not sized because the shell holder would not allow the case to be fully sized. Just like the 10mm, to chamber properly, that area HAD to be sized. My buddy had already "been there and done that". It was really quite simple. Using a strong single stage press (the RCBS Rockchucker), a steel washer of the proper size was laid on top of the shell holder and the case carefully set on the washer and pushed into the die until the rim of the case seated against the base of the die. Of course, beforehand, the decapping rod was completely removed from the sizing die. After the case was fully into the die, a dowel rod was inserted in the die from the top inside the case, then you would gently tap the case out of die. It was easy/peasy and only had to be done once.
Note: our 40/65 die was, of course, steel. Further, the cases were lubed carefully with case lube before being sized. The effort to remove the brass was not terribly heavy. Now, your 10mm sizing die is probably a carbide die and that would worry me a bit. I would feel better, if a 10mm steel sizing die was obtained to use. Carbide is brittle and won't stand much pounding. You could fracture the ring or actually drive the ring out of the die. I would just get a steel die and proceed. You won't believe how easy it should work and production of the processed cases would be MUCH better than any other way I could imagine.
Understand, I have not done this on 10mm but if I wanted some rimmed 10mm cases, I would be all over trying this. Maybe one of your friends already has a steel die you could borrow to try.
Let us know how it works for you - there may be others out there who will become interested, too. I have shot my 625's a LOT with both .45 Auto, with moonclips, and .45 Auto Rim cases, also. Having the ability to choose either, depending on circumstances IS a worthwhile thing.
FWIW
Dale53
Years ago, I had a similar problem, but with a rifle cartridge. This was a LONG time ago. I had some friends who were competing in Black Powder Cartridge Rifle Silhouette Matches. I decided to join them. It was suggested that a .40/65 had some advantages over the .45/70. Mostly because of less recoil. Prone shooting over sticks could be really hard on the shooter. Because of body position, the recoil was not absorbed by movement of the upper body, so it could be serious over a lot of shooting during a match.
There were a lot more 45/70 cases available, then, than 40/65 cases. The .45/70 was the parent case of the .40/65.
There was an issue though, similar to the issue you are having with the making of 10mm rimmed brass. When we ran the 45/70 cases through the 40/65 die, the area near the case head was not sized because the shell holder would not allow the case to be fully sized. Just like the 10mm, to chamber properly, that area HAD to be sized. My buddy had already "been there and done that". It was really quite simple. Using a strong single stage press (the RCBS Rockchucker), a steel washer of the proper size was laid on top of the shell holder and the case carefully set on the washer and pushed into the die until the rim of the case seated against the base of the die. Of course, beforehand, the decapping rod was completely removed from the sizing die. After the case was fully into the die, a dowel rod was inserted in the die from the top inside the case, then you would gently tap the case out of die. It was easy/peasy and only had to be done once.
Note: our 40/65 die was, of course, steel. Further, the cases were lubed carefully with case lube before being sized. The effort to remove the brass was not terribly heavy. Now, your 10mm sizing die is probably a carbide die and that would worry me a bit. I would feel better, if a 10mm steel sizing die was obtained to use. Carbide is brittle and won't stand much pounding. You could fracture the ring or actually drive the ring out of the die. I would just get a steel die and proceed. You won't believe how easy it should work and production of the processed cases would be MUCH better than any other way I could imagine.
Understand, I have not done this on 10mm but if I wanted some rimmed 10mm cases, I would be all over trying this. Maybe one of your friends already has a steel die you could borrow to try.
Let us know how it works for you - there may be others out there who will become interested, too. I have shot my 625's a LOT with both .45 Auto, with moonclips, and .45 Auto Rim cases, also. Having the ability to choose either, depending on circumstances IS a worthwhile thing.
FWIW
Dale53
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