Please, one issue per thread only. Post in the appropriate category (if you are an XBOX360 user, start a new thread on the XBOX360 support forum. Don't hijack an existing support thread in the PS3 forum as the XBOX and PS3 controllers are different).
Can you describe the problem you are having with fast reload - please include:
1.) Which controller you own
2.) Which fast reload mode you are on
3.) What delay number is set in your fast reload mode
4.) What gun are you using
5.) You already answered this, sleight of hand is off
6.) Which COD game you are in - you already answered this MW3
We'll try to help you out!