I really hate it when some boutique loader tests their ammo out of a 10" test barrel and uses THAT chrono data for their ads. FOR SHAME!

You aren't going to get anywhere NEAR that speed out of a real gun, certainly not one with a BC gap and a 4" barrel.
And remember, all that powder burning in the THREE FOOT FIREBALL in front of your barrel does not affect the target or your gun.

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Science plus Art