There are already 170s in .277 and 195-200 gr. in 7mm bullets. These are more like target bullets but not all of them. There are also 128-130 grain bullets in .257 persuasion but they require a 1-7" twist. Weatherby's are about speed so the mid range bullets optimize this best, but the heavy for caliber VLD bullets would extend the range and reduce wind drift. I think the latter option is what the 6.5 RPM is designed for.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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