Pick a lead 200 Gr SWC, load it up with 5.0 Grs W-231, and go shoot some targets.
For a light plinker get some Berrys 185 Gr HBRN, use a charge of fast powder, and go have fun.
Or buy some X-Treme 200 Gr RN bullets, charge em up with some WST or N310, and go play.
So many possibilities. Congrats on a fine gun.