Is the face of the magazine follower "concave and/or dimpled" for better centering the soft Hornady FTX tip? If it is, then it already has had the newer design installed; the old design has a "flat" surface. That said, my older .35 rem still has the original old design follower with a flat face and it cycles/feeds the Hornady LE FTX ammo fine without any issues... yours may too? I actually bought a newer design follower for my .35 rifle when having to get one for my 444, but just haven't gotten around to replacing it yet since no issues. The older follower/jam issue with the FTX bullet seems to be more of a problem with the bigger bore rifles due to the steeper angles involved, bigger case diameter, mag tube bulge, etc., but all depends on the individual rifle I guess. Btw, you can get the new design follower in several materials online, stainless, brass, aluminum, and the plastic/delrin if wanted.
I'm not sure exactly which bullets you're referring to, but any off the shelf brands with a round or flat nose should be fine; with the spire/pointed bullets out there to be avoided. For what it is worth, my own .35 rem groups best with that Hornady LE 200gr ammunition... really impressed me when first trying it.
Good luck to you.