Irv, the Nikon P-308 : amazon.com/Nikon-P-308-Matte-Scopes-4-16X42mm/dp/B01B6FBRQI

I would try the one that comes with it before I thought about changing the scope then the choice of optic would depend on how you use the rifle

Irv - For this rifle, the Vortex Crossfire II would be perfect. The 3-9X40 would be perfect for this rifle, at shorter to intermediate distances, and would still provide the capability to 'reach on out' and make your shots at longer distances. Lifetime "No questions Asked" warranty. Perfect scopes for the shooter who wants to make some longer shots, but doesn't want to invest four figures in a scope.