There is no more of a problem of putting in a 25 ACP case or a 209 primer in an Omega with a scope on it, for that matter the 25 ACP is a little easier. The Omega is not junk, they are well made muzzleloader's and shoot well. As far as the 25 ACP eliminating the fliers, I don't know, but I can tell you, my accuracy got better and I do not get any blow back. I don't think you would be disappointed.