Do you load them at cast velocity, or do you(or can you) push them a little harder? Not jacketed speeded, I'm sure, but just a little faster?
I've been using the coated bullets from SNS since they first came out, was using bare lead from them before that. I load them in 9 and .40 and my data tends to show that with all else being the same (OAL, powder, bullet weight, etc,), out of my guns, the coated bullets from SNS tend to be a little slower than bare lead. In .40 with 180 grn LFP, average velocity was 810 fps (145 PF USPSA load). Same powder charge with coated, average velocity was 750.7 (135 PF).
Major PF loads in .40 showed the same trends, but were a little closer with coated being about on average 10fps slower.
The coated are a lot cleaner, both during reloading and after shooting, however for me anyway, the coated took a bit more time to get the belling die set correctly. Too tight, and coating would be knicked off the bullet, exposing lead. Too big, case mouths would split after only a few reloads.
Bayou Bullets (one of the first to offer the coated bullets in the US),now takes orders online and do have sample packs. I've read that some use their coated bullets in Open Div Major PF loads in comped guns with no issues. Velocities in .38 Super/SuperComp hit mid 1300 fps with 124grn bullets and if leading were an issue, comps would be getting messed up. I've never tried them in Open loads, I prefer to stick with MG to prevent any chances of leading in the comp at those velocities. I've read reports from different shooters saying they've seen no leading at all, while others have reported having to scrape lead from the baffles of their comps.