I believe that speed beez also offers an 8 round loader. I recently purchased 2 5 star loaders and the quality is excellent. Most 627's also are cut for moonclips and north mountain shielded holders are excellent. Finding a loader set up for the 8 shooters has been a costly adventure for me so I hope this helps, good luck!!
I just bought a 627. Wanted to use it for bowling pin matches and club rules are no moon clips, speed loaders OK. So far 5 star seem to be it. This is the first I've heard of speed beez (thanks!). Both are pricey but every review I find has them as excellent. I'm just going to have to bite the bullet (ouch!) and get some.
No moonclips ughhh!!! I would go with the speed beez spring loaded 8 rounder for competition then. For personal protection, the 5 star or moon clip without hesitation. Good luck!