I'm with TXHunter. I don't think you can do the animal justice without spending 3-4 hours at the range.
As others suggest, skip the pellets and go with loose powder. If you already have it bought, burn them up and use loose powder next time. Cheaper and more accurate. If you use speed loaders it isn't any more convenient to use pellets over powder.
Don't go over 100 grains. You don't need the abuse and it often decreases your accuracy.
There are a lot of good bullets on the market. The XTPs seem to shoot decent out of any rifle, have killed a ton of deer, and are readily accessible. As are the Shockwaves. Barnes are top of the line but expensive. But if you're buying pellets I'm guessing cost is not an issue

Personally, if I couldn't get to the range before this weekend I would skip the morning hunt and go to the range. Missing sucks but wounding one is the worst (or so I've heard, I've never lost a deer).

Good luck and have fun!