I got lucky and a couple of K frame Jet Loaders came up on fleabay with a good BIN price.
Was trying them out last night, and some of the snap cap rims would tend to stick in the loader and be pulled out of the cylinder a little bit as the loader came away.
I didn't make the connection initially, but my OCD noticed that the edges of the holes in the body of the loader where the cartridges go were a little ragged. Combination of molding flash and wear made a rough little lip there. I shaved around the edges just the slightest chamfer with an X-acto knife and then finished with some well-worn 320 grit sandpaper. The plastic is a glass-reinforced material, which makes it stiff and works cleanly without having to chase whiskers. Left a nice, smooth edge.
Tried it again with the snap caps, and Jet Loader came away from the rims cleanly, leaving them all fully inserted.
I guess that technically makes this a high-speed, low-drag detail for your Jet Loaders.
As far as an overall product review, I've used Safariland Type 2 previously. I really prefer the way the Jet Loaders authoritatively snap the cartridges into the cylinder. So yeah, I'll continue to buy any that I see for cheap.