Shootin, the Sierras will blow up if you run them too fast. My grandfather has collected more data on the ProHunter than the average reloader could use in 3 lifetimes. That's the main reason why I listen to the old coot lol. But we've played around with the 6mm's, .277's, and .308's in so many different configurations to the point it will make you cross eyed. For this bullet, speed is not your friend.
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