mnprohunter
I think you will find that there is a lot more than just primers involved. For instance Sabotloader don't have the problem of crud ring and I get it so bad that it takes me 5 minutes of serious cleaning to get it out before it is possible to load the next shot. There are a number of possibilities including what is use to clean and what is used to preserve as well as the primer. I tried the primers recommended to reduce crud ring and could not tell any difference. If they had not come out with Blackhorn 209 I was going to set up a test program and try and pin down the things that cause or cure crud ring but Blackhorn made it immaterial as it is not only unnecessary to wipe but actually detrimental to accuracy. Above and beyond that it reduced my group sizes by 50 percent and to me that says a lot. Lee