What are your intentions for the rifle? You are underutilizing the abilities of the rifle by limiting your magnification to 4x. I’d say look at a Leupold VX3i 3.5-10 or something comparable.
Which 7mm? 7mm Mag? 7mm-08? 280 Rem? For the 7mm mag you might want a 4-16X scope. A 7mm mag has long legs so to speak. For the lesser 7mm calibers I would say something in the 3-9X or 2.5-10X.
For hunting, Leupold 3.5-10x40 is great. I have an old 4x fixed power on my 7 mag. I bought it that way and it is good enough for any reasonable hunting shot that I would take. If I ever decide to change, it will be the 3.5-10x40.