1) I am looking to get a can for my 243. I am looking at purchasing a new rifle in 6.5 Creedmoor so obviously the 6.5mm can would be the best choice. I have no need/intentions to go any larger in caliber but for the sake of having that versatility, would a 30 cal can suffice, especially on the 243? On the website it says it's doable but I'm just wondering if anyone has experience w using a 30 cal can w a 6.5 and/or 243? I'm leaning towards going w the 6.5 can so I know I get the most out of the can but it's tempting, for the sake of saving the money, to just get the 30 can. 2) I have a JEC muzzle brake (I know, "brake on a 243?" I mainly shoot groundhogs so the extra recoil reduction+decrease flip is amazing) and I'm wondering if it will work w the CB adaptor w the Ultra 7? (Or if u use a brake does it have to be Thinderbeast brake w CB adapter w Ultra 7?) Hey, thanks for your advice everyone, I appreciate it!