re: New Deer rifle

quote:

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300 BO is too slow and will tumble and not expand at times.

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Yes, the 300 BO is not a high velocity round, but when used properly it's still a very effective deer hunting round.

It tumbles only w/ heavy bullets at subsonic velocities. Since those bullets don't expand at subsonic velocities, tumbling is how they cause internal damage. The lighter expanding bullets at supersonic velocities expand like a typical hunting bullet and do not tumble.