
I've got two Peltor Boxes and 1 Speed Beez box loaded up for my 617 and tomorrow's Steel Challenge Match.
I had reloading blocks at the range so I do it at home the day before a match.
Steel Challenge only takes 200 rounds but required 39 reload. I have 17 DS-10 Speed Loaders so I need pre loaded loading blocks to finish the match. The boxes give me some extra loaders if I ever need a reload. It hasn't happened yet when shooting my revolver but it's good to be prepared.
I also keep extra ammo for the guys that want to try my gun at the end of the match. I've convinced more than one skeptic to shoot a revolver after testing my 617.