That's still amazingly steep (too steep); mid-40's degrees difference between advertised and .050" duration is normal for a steep hydraulic flat tappet cam ramp. (Like the VooDoo or XE.)
JEGS shows 221* at .050" but that has to be wrong. It is almost certain to be in the low 200's or even high 190's duration at .050" TAPPET lift, considering the 248* intake advertised duration and intake valve lift of .410". MP cam ramps are not typically the steepest around.
