I want to load a 2 1/2" 6-7.5k psi low pressure 12 gauge shell for a damascus gun. Can I find a published 2 3/4" fold crimped load in the books I like, cut the shell to length, and roll crimp w/no worries?

Is there any historic information in DGJ, or any other resource, that may have some of this data?

Thanks!