Tinker, Marv is right as usual.
To explain a little more, the current SB-1 is at least as strong as as the older 158/Topper action was. The Topper was made in .22 Hornet, .223, .30-30, .357 Mag, .44 Mag, .45-70, and a few more, so those calibers will be OK on a shotgun frame. All of the .308 and .30-06 case based cartridges are too much.