I agree with Dave M's post. Test for accuracy with your weapon. There are so many choices in saboted slugs now days in terms of size, shape, velocity, etc.....
There seems to be a trend towards slugs with less mass and higher velocities, though I prefer using the Lightfield 2-3/4" Hybred EXP, (
http://www.lightfieldslugs.com/lightfield/) advertised as 1-1/4 oz - 1454 ft/sec - 2564 ft/lb muzzle energy, for shots up to 100 yards. Their trajectory varies only about 2" over this range, and the perceived recoil (to me anyway) is managable. While I've only been hunting venison for three seasons, and maybe don't have the vast experience of some on this board, I've never had to track any of my five deer after they've been hit with one of these.
The 3" Commander IDS has a very similar trajectory to the EXP, with higher velocity, 1-1/16 oz - 1800 ft/sec - 3346 ft/lb muzzle energy, and is good out to about 125 yards. Also, the Commander IDS in 3-1/2", while I've never tried one on a deer, appears pretty devastating at 1-1/16 oz - 1900 ft/sec - 3728 ft/lb muzzle energy. They've got some video footage at:
http://www.lightfieldslugs.com/lightfield/press.cfm?pageid=335
I've also heard of really good results using the Winchester Partition Gold (
http://www.winchester.com/products/catalog/shotdetail.aspx?symbol=SSP12&use=7) but they're about double the price of the Lightfield.
Dunham's Sports (Lancaster?) usually has pretty good pricing on both these brands.
Good luck on the hunt. Hope I've helped a bit!