We had a long thread here a while back on forming .32 Long Colt brass. I formed a .32 S&W Long case in a Lee 0.323” sizer. With a solid shell “holder”, it forms all the way to the base (wax case lube is absolutely necessary). Then I ran it through a Lee 0.314” sizer. It would go down to the front of the solid base (around the primer), but it would NOT go down to the base. I then turned down the “belt” with a file while mounted in a drill. It was suggested during the thread that I might get a custom Lee sizer in-between the two sizers I have.
I decided to try that. I ordered a 0.319” sizer from Lee. Took about 3 weeks to arrive. It looked good, was correctly sized, and I immediately tried it out. I was able to run the shell fully into the sizer down to the base just like I do with the 0.323" sizer. Because of the springback, it came out larger than the sizer, but it was smaller than I had been getting from the original two sizers. Again, the 0.314” sizer would not go all the way down, forming a belt to be filed off, but it is less in diameter than it was before. That means that the filing takes a lot less time.
I have pressed some primers into a few of them and did not find any problems there. I am not sure where the compressed brass goes, but it is not intruding into the primer pocket. I will be sectioning at least one to see how much thicker the wall is than what I made before.
Thanks for the suggestions, guys.
On the left is a previous picture of (left) a 32 S&W Long run through the 0.323" sizer. Running it thorough the 0.319" sizer looks very much the same. The center case is after it was run through 0.314" sizer. Now that I am using the intermediate sizer, the belt is less pronounced. The case on the right is after the belt is filed off. The final OD is approx. 0.316". The picture on the right is the solid shell-holder I use to run the cases fully up into the sizers. I then use a rod and a leather hammer to drive them out.