I will just say that the guy and his wife are very nice. It seems like a small business and they are doing there best to make high quality tubes for a huge market. So, it may take time, but you are giving your money to real people and not a corporation.
Yes, it will work. Just about anything coming out of a 12 gauge at door-bustin' distances will work on bustin' doors. Frangible is preferable. Raiding some crack houses are we?