using stripper clips for m1a means you can’t use a over the port optic mount like a sadlak. The chance you need to use a striper clip during active engagement is small, they where meant for quick reloads in the field during lulls in combat. Many soldiers say the field resupply for m14 came preloaded stripper clips, not that old to know that.
For m1a it’s better to have 20 round parkerized mags and get used to doing quick rocking mag changes.
For m1 garand the clips direct load Into breech and watch for garand thumb. Many carried extra clips in pouches the movie idea of using sling as a carry is a no go as your ammo gets dirty as you are moving through a dirty environment and putting dirty ammo in well. I have heard stories of guys aquiring 30 cal pouches and using them to store the garand clips