H-100V is the velocity champ in the Roberts. Not as temp stable as H-4350, just faster.
My Brux barreled, LA .257R shoots near one hole groups with the 100 TTSX over H-100V at 3,250 fps.
And, it's a killer.
What's not to like.
Check COAL, too long for SA, fine in a LA 700.
DF