gman57

Another ring you might want to check out is a 5-193. It is a commercial high pressure - high heat 'O' ring....

If you want a more permanent solution you could install a 'stainless' steel washer in the bottom of the primer pocket. You will have to turn it down to the correct diameter and thickness. One problem might be the thickness... i am not sure what that might be but Ron would know.

Here is one installed in a Knight BP...



I probably have 100 shots on this stainless washer now and it shows no signs of wear - actually it is really hard to tell if the washere is in there or not...