Testing, testing...

[JASmith]

...I don't know where your 2750 fps figure comes from...

I got the value from Gary's ammunition: http://www.inetres.com/gp/military/infan..._ammo.html

Note that the value is for 78 ft from the muzzle -- I couldn't find a call-out for barrel length.

The difference between 2700 and 2750 ft/sec is within the normal spread of chronograph testing. As with Tony's comment, we want to err a tiny bit on the high side in those performance parameters that we want to equal or best the M80.

Can't do it with everything, else we get some grotesque requirements. We also need to keep the parameters where we demand "significant" improvement to an absolute minimum for the same reason.