Just get a couple of new magazines. You didn't say how the loads hang up but a properly working magazine should not have any feeding problems. None of my SMLEs have ever had any feeding problems, mil-spec ammo, spire point hunting loads or Hornady round nose soft points. And btw, a roound nose bullet loaded to the same length as a mil-spec 174 gn spire point bullet may well be too long to cycle and might hang up.
I would suggest first trying to seat the bullet a bit deeper to see if that helps cycling. If not, then get a couple of new magazines. HTH.