There is NEVER a reason to remove the belt on a belted case. The reason people have case splits and other problems with beltless cases is because they full size the cases, creating real headspace... which leads to cases stretching, and splits. An experienced handloader will not full length size any belted case. They use the shoulder to set dies, exactly like a beltless case... There are no headspace gauges for belted cases with the belt removed.