Universal speed loader - Butler Creek Asap Magazine Loader Universal Double Stack 380Acp-45 Acp

I mainly bought this product to use on my Glock 17 mags. I found that it doesn’t work ver well at all. I was able to get three or four rounds into the mag and then it was not able to push the rounds I had already put in any longer. I did try it on a single stack roger that I have and it worked fairly well but I was disappointed because it is not universal.