If you want to use the Sniper Rifle (Barton AMR (Anti-Armor))
The spread sheet I built has.
Pen Factor = 1.5 =(AP+IF(INCEND="yes",2,0))/4
Damage Factor = 24.5 =BD*(3.5+(ROUND(BURST/5,0))+IF(INCEND="yes",1,0))
Reload Factor = 1.0 =IF(SHOOTS/3>1,1,SHOOTS/3)
Final Damage = .74 (which of course will be treated as .6 in game)
ROUND(((PEN*DF)/50)*RELOAD,2)
Most the errata I found seemed to revolve around Damage factor.