I get 2000fps with 60 gr Varget and 350 Hdy RN with CCI200 in RP cases in my NEF Handi-Rile. I would back off to 50 gr to start with with TSX's and keep them to 1800 fps in the double. Lead gas checked would be a better choice at these velocities IMHO.
Play safe.
Last edited by jimone; 06/12/12.