I don't know, I kinda like my RSM's a whole bunch. I'm now getting into Whitworths as well. I picked up a Whitworth in a 458 WinMag and haven't fired it as I'm waiting for some 450gr 458 solids to load up for dummy rounds to send to my smith for a little pre-emptive work. I'm adding an extra crossbolt and maybe one between the mag box and the trigger, then glass bed it and add a new recoil pad for it. He's also going to make sure it feed NF solids and cuppoints. I may also have him give me a trigger job along with smoothing up the action. It ain't a RSM but I couldn't resist picking the thing up.