I did my part I have a model 700 sendero and a model 7 chambered in 7saum. I bought brass as I bought the rifles, I have the components I need to shoot both.
I have one of the Rock Creek button rifle barrels on a 243 from a group buy a few years ago on Snipers Hide. The best “I” can get it to shoot is .42 for 5 shots. Can it do better probably!!