The useful service life of the steel frames is likely a couple of thousand factory rounds.
If you only use your Topper 30-30 for hunting, you will never come close to shooting this amount.
I certainly could not afford to buy that that many factory loads, but i do sometimes get carried away with shooting reloads. I want to baby mine and make it last a long time. Before next deer season, I am going to rig some iron sights that will withstand knocking around that would terminate the red dot or a scope.