Spent some time today shooting different loads through the chrony.... Mostly to see the difference in brand "X" vs. brand "Y" but also to see the difference when fired from my 1911 and my new AR carbine. Pretty impressive! Each load (on average) gained about 200-300 fps when fired through the carbine. So my new favorite round for the carbine is the Remington .45 acp+P JHP moving at about 1350 fps out of the carbine.