Tntrapper, I had a .223 'slow twist' (1/14) barrel cut for using lighter weight bullets and tested both the 35gr and 40gr V-max bullets and found there was no real advantage to using the 35s over the 40s, other than saying I did it...
With that rate of twist, I can pump them up pretty well for 'shock' effect and not worry about them flying apart down range..Both weights had equal accuracy.