The OP asked for cartridge bullet combo's that were effective on Deer and left a good blood trail. He also stated he'd be hunting in heavy timber. I'm originally from Northern Michigan and that pretty much sums up the hunting we always had back home. 100 yard shots were almost unheard of unless you and the deer stepped out on the two track at the same time, otherwise you just couldn't see that far.
We all tended to shy away from calibers smaller than .270/.284 with .30 calibers pretty much taking the lead. .30-30's with 170 gr softpoint bullets, .300 Savage with 150 gr softpoint's, .308's 165 gr core locks, 30-06's with 165-180 gr core locks. They all did pretty good duty putting the animals down quickly or left a good blood trail with good hit's. Also of honorable mention was the .32's in both Win and Rem. and another oldtimers favorite was the .35 Remington.
Something nobody has mentioned is the bullets "brush busting abilities".
When hunting in thick stuff there is usually the too small to notice twig that get's in the way. Lighter bullets and hollow points can more easily be deflected or fragmented by that twig. Partitions on the other hand usually seemed to punch through the deer without causing much "shock" to the deer, they still died with a good shot, just sometimes the deer never even acted like it was hit.
The OP doesn't mention the rifle he is going to use, I think I saw earlier he had selected .30-06 with 180 gr. core locks, good choice IMHO. But is he using a scope, Lower power would be best for the field of view and better light gathering capabilities. It gets darker earlier in the thick woods than it does watching the meadows. Another option is a Peep site over standard iron sites. Acton type is also a consideration as a light and quick to point rifle is hands down easier to manipulate in the thick stuff that your standard beanfield rifle. Just some other things to consider in the selection process.
Good luck to you, and as my Dad always say's "get a big one".