The next thing I'd look at is momentum. Higher velocity with a 180 may give higher momentum. If you know the velocity of the loads, the momentum calculation is BW / 225218 x velocity = Momentum in Lb-seconds.
I'll toss out a couple of examples. 1225 FPS is the top velocity Lyman shows in the P&R III for the 180 gr. Sierra JHC (SD .161). The data may be a bit milder than some at or below 30,000 CUP, but they used a JHP for both 180 and 200 gr. weights. Stats for the 180 are .9791 Lb-second of momentum with a muzzle energy of 600 Ft'lbs. Highest velocity for the 200 gr. XTP (SD.179) is 1148 FPS. Stats are 1.0195 Lb-seconds with 585 Ft/lbs. The energy of the two is pretty comparable with only 15 Ft/lbs of difference. Momentum however is a bit higher for the 200 gr. XTP. I can also tell you that XTPs are very well constructed as far as hollowpoints go.
But while I have the Lyman manual open I'll mention another option, the Sierra 190 gr. FPJ (SD .170). It is a flat nose bullet that has most of the lead at the nose exposed. They are not exactly designed to expand, but they can deform, while they're likely to penetrate greater than either of the 2 JHPs. Lyman shows the highest velocity for it at 1189 FPS. 1.0030 Lb-seconds of Momentum with 596 Ft/lbs of ME. It's what I'd choose in this case.
