Removing and disassembling the bolt of a Swedish Mauser is a pretty simple affair and may need to be undertaken for any number of reasons. Most commonly, you’ve picked up a rifle nearing a century in age, and there’s a lot of gunk and crap in there that needs to be cleaned out. The other scenario is that you could be modifying your bolt to cock on close, or reduce lock time with lighter materials and a stronger spring.
Whenever there is more than one option, shooters around the world will have vastly differing opinions for and against each. The same could be said for push vs controlled feed bolt action rifles. However, after over a hundred years of having both on the scene, it seems a sort of stalemate has been reached.