220-240gn round nose performance on game?

[cr500]

Does anyone have any feed back on how 220-240 gn round nose bullets went on medium game at subsonic velocities? I,m interested in the 240gn Woodleigh round nose, but they will be realy tough ,suited to large game. Do the 220 Hornadys start to mushroom at this velocity? Do these longer pills tumble when they hit a medium sized animal? How about 240 Sierras? Do they tumble at all?