I am trying to build up a little ballistic info for my 16" barreled ar 15.  The thing is i dont know the muzzle velocity's or the BC's for the different rounds.  Im looking for info on the federal gold medal 69 gr. SMk,   PMC with the 69 gr SMK,  I know their bc but not muzzle velocity. the Q3131A and winchester bulk from walmart USA223R1VP.   Thanks and if you know of any others feel free to add them in maybe someone else or i can use the info.  Major    

Quoted:    I am trying to build up a little ballistic info for my 16" barreled ar 15.  The thing is i dont know the muzzle velocity's or the BC's for the different rounds.  Im looking for info on the federal gold medal 69 gr. SMk,   PMC with the 69 gr SMK,  I know their bc but not muzzle velocity. the Q3131A and winchester bulk from walmart USA223R1VP.   Thanks and if you know of any others feel free to add them in maybe someone else or i can use the info.  Major

Since each rifle is a little different, just buy a Chrony from midwayusa.com.  They're well under $100, and they're very handy.