This may all be academic. I set it up last night, and the Forester Classic case Trimmer is TOO LONG TO TRIM 9MM! You can vary the length of the 2 end pieces a bit by removing two screws and moving them out to a second screw hole. However, the carbide cutter still won't reach the 9mm case. On their web site they list a shorter base to use for 9mm. I didn't see this in the literature prior to buying it and it came with the collet for 9mm, don't remember if the pilot was included. A second hole on the frame at the collet end would have solved this problem for the Forster customer. Anyway, looks like I'll just go with the flow. My record is still perfect. I have yet to find pistol brass that needs to be trimmed back to the suggested length in my manuals.
Thanks for the input.
hsmith, re- "If you are crimping more than just taking the bell out you can lose the case tension and have bullet setback on the feedramp, this can lead to dangerous pressures." One step I use after crimping a few rounds is to measure them, make a note of the lengths, and load & eject them several times. I then re-measure them. This lets me know if I am crimping enough to keep them snug in the case. I don't get the benefit of actual recoil, but it gives me some idea.