I've been shooting my 788 .243 since the mid-'70's, reloading for it for the last ten years. Have never had a problem, but, then again, I've never tried to blow it up by overloading it.
Originally, it came with a 4X on it. Shot it that way for a year or two, then switched it out for Tasco 3-9X. Served me well for several years, but got replaced about ten years ago with a Bushnell Sportview 4-12X40. Love it. I think this one will stay.