Haven't loaded the 200 gr Sierra's as yet...and have used IMR4198 with the 220 gr Hdy to date (32.2 gr for 2000 fps - did not chrony so cannot prove what the Hornady manual claimed for velocity in the 20" barrel).
Load Data states that IMR4198 and Re-7 give the highest velocities, while H-322 gave the tightest groups in the Winchester.
Shooter's Reference provides data for both IMR4198 and H-322 for the 200 gr bullet.
Going to be trying some of these loads myself in my Marlin and my Winchester.
Because I know how well the 220 gr Hdy shoots in my Marlin, I will probably stick to this bullet in the Marlin, and develop loads with the Sierra in the Winchester.
Probably be May when I get around to this, as focussing on my trip to New Zealand at the end of April/beginning of May at the moment. Although Susan is looking forward to hunting bear this spring when we get back!
If I don't get to it then...may just hunt bears with the 338 Marlin Express or my new to me 444.