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Had seen a discussion on the velocity of a 397 at various pumps, these are four shot averages in .177 using 7.9 crosman premier hollow point 2 pumps 432 fps 4 pumps 561 fps 6 pumps 631 fps 8 pumps 684 fps 10 pumps 724 fpf. this was done in my basement at about 60 degrees f, chrono was a...