I have the XD 45 Compact. Is there a big drop off in velocity with the 4" barrel compared to the standard 5" barrel? I know the .45 ACP is already a slow round and have heard of sub 800 FPS rounds in the 4" barrels. I don't want to use +p due to the added recoil. I use 230 grain Speer Gold Dots in my gun, anyone know what these chrono out of in the 4" XD's? Thanks.