THIS. There are about three commercial reloading enterprises in the US that I would trust to provide reloaded ammo and I'd bet yours isn't it. Unless they have a robust QC/QA program that includes daily pressure testing they are not to be considered as an ammo source. Buy SAAMI spec factory ammo and stay out of these messes. Your story is not the first one I've seen or heard of using "commercial reloads" that gave an overpressure event. Your gun didn't blow apart and that's fortunate. Please don't shoot that stuff anymore.