With a heavy heart I found out that Dale Trout former owner of Thoroughbred Rifles and former owner of the centerfire actions of Stiller actions has passed.
He was 69 years old and died in his sleep.
May He Rest in Peace
Why don't you go to a few matches and see what the shooters are using. This way you can get real time info and ask questions and look through some scopes.
As said above place patch off center and push through.
Or if jag is to big place it in a drill with some emery cloth to reduce the diameter. Make sure you clean it well.
Use your brain to come up with a fix.