Well, on my 300 wsm, I have a Ziess conquest 4.5-14. I shoot far better at 100 when I'm at 4.5X than 14. Same with my 7 mag with a leo 4.5-14.
Give it a try. At 100 yards, I can easily pick out any kind of target at 4.5X. Sure, it's small but I can still see it. Shoot say, a 5 shot group...