The Jr.'s press frame is not as massive as the Rockchucker, nor does it have compound leverage. This is mox-nix as long as you are not going to swage bullets with it. You can make just as good ammo with the Jr. as any other, it just takes more force on the operating handle to size cases.

I recently bought a Rockchucker, but I still generally use my 1967 vintage Jr. for everything except heavy-duty sizing and case forming. But being kinda nuts, I still use my old-time Lyman 310 tong tool from time to time as well.....