I don't know much about scopes but on my slug guns (2) I have fixed power, one is 1.5x power and the other 2x, as I said I know little about scopes but mine are designed for shotguns, (I don't know if a regular rifle scope is OK or not) maybe someone with more knowledge will jump in and let us know. If it is a dedicated shotgun scope I would prefer the fixed power,(my shots are mostly under 100yrds) if I were to switch it to a rifle
( a some time) then maybe a 3x9 might be more attractive, jmop Doc