I have the 311041 & the 311407 group buy. These are both 170-175 grainers. I have an old Lee 190 grain so haven't felt the need for anything but I'd bet that RCBS 180 should really shoot.
For plinking, I am now a converted plainbase boolit shooter with the 120-RF Group buy or the #322 Saeco sized to .310 and loaded with 8 grains Unique. Gaschecks I will save for the heavy loads and my 30-06 loads.