I have been looking for speedloaders to use with a Colt Officers Model .22LR. The only ones that I can find that reference using with a Colt are made by HKS, models MK3A and 22K. The MK3A is listed for use with a .22 Diamondback while the 22K just says "Colt". Anyone tried these with an OM? I need these to be able to compete in a stock revolver class shooting steel falling plates. Without the speedloaders, it would be pointless to try to compete as the stages are timed.