What If... new 300 gr 338 AND 30 cal bullets?

Re: What If...?

Sounds great for target shooters, what about a hunting bullet?
And a 300gr 30cal bullet?????...............huh? Im guessing youd need an, oh, say, 5 twist bbl, and a minimum case capasity of a 300 wby? hahaha:D What gives BH?
Can the 300gr 30/30 bullet be used in a Winchester 30/30? Or is it capped at 170gr?
 
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