Mauser; I don't use the vari flame. I use the 25acp breach plug. From everthing I've read on this forum the vari flame adapter is just as dirty as a regular 209 primer in the orange primer carriers. There isn't much you can do with the orange primer carrier to prevent blowback. There is a lot of information on this site concerning this. Try looking at some of Bustas post or send him a message. Sorry I could'nt help more. Jeenks