I’ve also got a JR500 and I’ve purchased the Weigland base and use a Leupold 2.5X8 scope and a Leupold DeltaPoint red dot. I use the scope for load development and the DeltaPoint for general shooting. Never had a problem with either one. I’ve got ole eyes and need all the help I can get.
I tried a 2X scope and didn’t like it, as I could shoot with open sights about as well – the 8X really brings the target in and you can see your unsteadiness. I’ve got some loads that shoot consistently around 1 inch or a little larger at 100 yards rested using the 8X but with open sights rested, I can’t even come close to an inch and sometimes I need a bushel basket to cover the holes.
The DeltaPoint allows one to shoot pretty decent at long range using the tip of the delta as your aiming point. I can hit a beer can at 100 yards more often than not using the DeltaPoint but using open sights it’s quite the opposite – a lot of misses with an occasional surprise every now & then.
How did that 4X work for you?