I had basically the same gun and never needed to go over 100grs and with conicals (full bores) 80-90grs was plenty.
CVA does NOT recommend over 100gr of loose powder also. I shot mine a few times with 110gr but i used mostly 250gr or less bullets with sabots.
90-100grs and a 250gr GoldDot or Barnes Expander MZ shot good without beating you to death.