OK; let me explain again.
When I designed my tool I had a Lee Hand Press in my hands. The leverage on that tool works exactly like a crankshaft, the leverage increases the closer you get to "top dead center." I optimized that ratio on mine and also increased the ratio between the pivot points on the handles. Mine has about 30% more mechanical advantage over the Lee Tool.
There is a video on Youtube where Gavin is sizing fired .308 Machine Gun Brass, which is about the hardest stuff there is to size, in one stroke !!! It takes me 3 strokes on my Rockchucker.
It will size any brass round shorter than 3.75". I have one guy who does .577 NE on his in the field. People are using it for sizing boolits, which I never intended, but if it will, then do it. About the only way you can hurt it is by dropping it on a cement floor.
By following the instructions included with the tool you see that F/L sizing operations are done in front of your chest using both arms opposing each other. then turn the press sideways to remove the cartridge from the die. The hardest cases I've done myself were .375 Weatherby Mags. And pushing the case into the die was not hard at all . Getting it back out over the expander ball was hard because the press was way down in its lowest leverage area and the expander ball was on an old style and had square edges instead of the newer oval shape.
Every other operation is most easily done by clamping the press to a table top. The .577 guy put a piece of Velcro Tape on the bottom of his press and made a Velcro Strap to go around his leg and loaded ammo every night at the campfire. So you can do everything without clamping to a table. It is just easier to clamp it to a table. The clamps are $5 ?
See the video here, https://www.youtube.com/watch?v=xEpYQMdnxHY&t=1s There are others there as well.
I have loaded lots of .30-06's .308's .303 Brits, .45-70's and .44 magnums. I once did 200 .30 Cal. Carbines in 2 hours. The tool is just as fast as a bench mounted single stage press and especially if you got the LNL Version..
Randy