Buying new guns is fun and exciting and I would jump on the 06 if pushed. However, more serious range time with a few hundred rounds to get her(and you) up to speed on proper bullet placement under time/pressure with the rifle she has now would go a lot further in the bear defense dept. than starting over with a new gun.
Working your bolt smooth and fast, with a clean trigger press under pressure, while hitting your target where it counts does a lot more in self preservation(and confidence) than slinging heavier bullets when possibly cringing at the increased recoil.
If she can handle 06 as well as the 6.5 swede by making the hits when and where they count, great, but that fact should be proven at the range first before hitting bear country.
Like Sakohunter264 said, a heavy 6.5 bullet like the woodleigh's, nosler partitions etc. would do the deed when put in the right spot. Shelton et al proved that more than a few times.
