Looking to convert to hinged floor plate versus DBM for my SA 7mm SAUM project. Wondering which of those offers the longest overall cartridge capacity compared to the other? And compared to blind box magazine?

My intent is actually to buy a new new 16 FCSS or FHSS (stainless weather warrior w/accustock etc) and use the bottom metal and accustock. But I need to know which has the longer cartridge capacity.