I'm finally getting around to working up loads for my 6BR pistol, and now I think my scope crapped out on me!

I had a Leupold Mk 4 on the gun but I pulled that off to slap onto my 300WSM for a while. The 6BR was shooting great with the MK4 on there with 5 shots in the .3s with some randomly picked loads. When I put the Weaver on there to start some real load development, it went well for a few groups and then they all opened up. Like .7" and up! I tried the loads which had previously shot well (with the MK4 scope) and got the same results. It's frustrating because I can only get to the range maybe once a month. Now I'll need to burn up time swapping out scopes.

Do you guys have any experience with Weaver's customer service? Is it worth trying to get the scope fixed, or is it better to just replace it and move on?

Andrew