Caldwell lead sled or higher mag scope?

[trigger-finger]

I shoot with a Savage 11 Trophey Hunter xp in 308 with the 3-9x40 Nikon scope. Was having problems sighting in scope because I always shoot by myself with no spotter.
I was looking to get scope with more zoom but couldn't decide what I needed yet (ffp vs sfp). So I purchased a Caldwell lead sled plus and two 25lb weights. So far, If nothing else I love the lack of pain in my shoulder from shooting 50+ rounds per trip. Works better than limbsaver, plus much better grouping and more consistent shooting.
However, I am wandering if money would have been better spent going towards a scope with more zoom. I.e. 4-16 or 6-24. I mainly sort benchrest at 100 and eventually 200 yards. Can this be done well with Nikon 3-9x40 and lead sled or trash sled and get better scope?

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