I would sure like to get to the bottom of what the differences are in the Omega rifles that make some people able to use 777 and others with the kind of problems I have with that powder. First I thought it was because our weather (Arizona) is dry but if you are in Florida it aint dry! Maybe I am too picky but I do not get the heavy difficult to remove crud ring with any other powder just 777 and the .25ACP does not completely cure it in my rifle either.Fortunately for me there are a lot of other powders that work better and actually give me higher velocity with less perceived recoil than 777 so it is only a condition I would like to understand just to satisfy my curiosity.