Using the 69 TMK out of a 19" 22-250 @ around 3150 fps on fallow, used to use the 77's out of an 16" AR @ around 2700ish.
The extra velocity of the 22-250 makes a big difference, despite smaller projectile. Neck shots and is like a fist punched through. Found this to be a good combination on the fallow and decent step up from 223, but can still maintain sight picture and quickly swing onto other targets if they are there.
Seirra make good bullets.
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