I have used them in the past in other revolvers brands in 44 mag and they worked great 15 years ago, since I bought my GP 100 I have got two model 586-A that are the model for my GP 100 and if I needed to reload with them I might as well do it by hard one at a time. I have to jiggle them and still they don't work right. Is anyone else having this problem? I'm very disappointed in HKS. I have changed the grips and even tried to use the loader with out grips installed and its the same every time.