I had two rolls of slightly expired #IlfordXP2, with more available (at that time) at a good price from the local Boots. So I decided to load them into my MX and LX cameras with similar lenses (SMC M 50/1.7 and SMC [EDIT] M 50/1.4), and take the same scenes with the same exposure, then dev one in HC-110 dilution E and the other via a lab in C41 chems. It didn't go well! For some reason the cameras disagreed about exposure. At first I kept them the same, later let each meter itself...