I was going to say that the numbers you posted looked a little low even for the smooth mods. Bowtech claims only 8fps less with the smooth.
Allegiance 279 fps.
Now, that was with that Allegiance set at 60 lbs. and a 29" draw using a 381-grain arrow, according to your earlier post.
For every inch of draw length you go down, you will lose 10 fps.
So... adding back on 10 fps for the 1" less than IBO specs would make it 289 (remember, we're starting with a chrono'd speed of 279)...
For every 5 # draw weight you go down you will lose 10 fps.
Add 20 fps for the 10 lbs. less draw weight below IBO specs would make it 309...
For every 3 grains of weight your arrow is over IBO (5 grains per pound) you will lose 1 fps.
31 grains above IBO specs would make it 319...
Bowtech claims only 8fps less with the smooth.
Add 8 fps for the smooth mods would make it 327 fps... which is at the very low end of what's acceptable (327-335)
Yep, unless you had anything other than the factory brass nock and hush kit on it, Mike from Texas is right up above.
- edited so Rob can hopefully "follow the math" this time and see how I came up with an IBO-spec speed for the Allegiance he tested today.