The 30-30 is not a trendy or sexy pick as a deer hunting rifle. But the facts were written in stone over 100 years ago about just how good a deer cartridge it is. Bullet makers have had a long time to perfect bullets made just for the performance of the 30-30 and most all loads for it are tuned perfectly to the velocity and ranges it's capable within.
Find which 150, 160 (FTX) or 170gr bullets seems to perform best in your particular rifle. Sight it in about 3" high at 100 yards and you will have a very capable deer killing tool from muzzle to about 200 yards or so. Good Luck!