I’ve had a RCBS and Forester on the bench, but the one that gets used is the weird little Lee trimmer. The pilot sets the trim length, so it’s exactly the same today, tomorrow, 5 years from now, when I’m tired, in front of the tv, in good light or bad light. I don’t own anything else from Lee, and didn‘t buy it to save money, but years ago a gun writer suggested to just try it with one caliber and see what you think - I was hooked. If it was $100 per caliber I’d still use it, but luckily these things are dirt cheap and fit inside a die box for that caliber.
You can run it in a drill or just do it by hand. For lengths not available you can get a pilot for a longer cartridge and grind it to the length you want. I get a cutter for every pilot and a lock stud for every shell holder so there’s no having to take anything apart.
It’s not for everyone, but it simplifies life a little bit and trims to the exact same length every time.
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