I am a .30 caliber fan and have two rifles for two different styles of deer hunting.

Old Marlin 30AS .30-30 with plain iron sights: I use this in the heavy brush, briars, and very heavy woods where I can drop a deer at max 50,60,70 yards.

Savage .308 with Bushnell 3-9x40 scope: This is my "go-to" gun and can do everything the ol' .30-30 can't. I use this up on ridgetops, clearings, overlooking an old pasture, etc... where I can drop a deer at 200 yards if need be.