I started some today, using Remington brass, but I found they gripped the bullet tightly with no crimp to speak of. I'm using the Lee carbide .38 S&W set.

I notice that one of your pics shows a couple of different seating depths. I didn't have much time today, so just put a dozen together with 2.2 gr of True Blue seated to the OAL in the book of 1.175", but that leaves a good 1.8" clearance in the chamber, so I was thinking of doing a few 1/2 doz batches at 0.1 gr increments, with a couple of different seating depths, then sticking the Webley in a vice and firing it single action, to see how the groups compare.