Yea that’s what I was worried about...it’s shorter overall compared to regular 38 round and those HST should sit up straighter. I’m just guessing no idea if this is an issue in practice"...bullet seated flush..." So does a WC. That JHP is similar to the old, old bullet, whose name I forget, that was a WC with the Hydra-Shok stem.
Using that bullet only means you'd probably have to wiggle and jiggle the loader some as the pointier bullets like an SWC, create a self-funneling effect a WC doesn't. So the 'speed' won't be fast.