I use Rimrock too. 158g SWC (15 BHN) mostly although I have used the 125 TC too in the past. Settled on the 158g bullets though for all my peanut shooting needs. I too noticed the price increase. Might have to start looking for a new vendor even though I am very satisfied with the bullets. I also buy .44 and .45 bullets from Rimrock also.
I think I am going to look into gathering equipment to start casting this year too.....
A clinger. When guns are outlawed, only outlaws will have guns. Single Action .45 Colt (Sometimes improperly referred to by its alias as the .45 'Long' Colt or .45LC). Don't leave home without it. Ok.... the .44Spec is growing on me ... but the .45 Colt is still king.