I also use the FA hand primer. Very satisfied with it. Easy to adjust, easy to switch for different cartridges, came with everything I needed for the cartridges I reload, except the 338 Lapua shell holder, but that was no big deal. I'm so satisfied with it I'm not looking for anything to replace it.
I do not know what the OP means by thumb pressure, but the mechanical advantage on this unit is sufficient to operate one handed. If you have a bunch of cases with tight primer pockets, your hand will get tired. I can run about 100 before I need a break.
I do not know what the OP means by thumb pressure, but the mechanical advantage on this unit is sufficient to operate one handed. If you have a bunch of cases with tight primer pockets, your hand will get tired. I can run about 100 before I need a break.