I have 10mm handguns from several different companies. The Springfield XDm provides the most support for the case, and the Witness is second best. Of course, the S&W 610 is the best, but it's a revolver. The Colt Delta Elite isn't much better than Glocks when it comes to an unsupported chamber in 10mm. I had two of the Colts, but sold one.
Before Magma Engineering closed their doors, they produced a Case Master Jr. for full length sizing of rimless straight wall pistol cases. It's based on a slightly oversized Dillon carbide sizing die in an arbor press. It has a manual case feeder so you can go through cases pretty fast, as long as your arm and shoulder hold out. The cases are fully lubed with spray case lube prior to sizing, but it's still quite a bit of work, but it does size the entire case, mouth to rim, since it pushes the cases all the way through the die, much like a Star bullet sizer/luber sizes and lubes bullets.
I have the 9mm, 10mm and .45acp setups for mine, but to tell you the truth, I haven't used it in awhile. With those setups I can size 9x19, 9x21, 9x23, 10mm, 357 Sig, 9x25, .40 and .45acp.
Hope this helps.
Fred
PS: Please don't leave your brass on the ground at the range. Someone else just has to clean it up.
