Go shoot a bunch of el cheapo ammo at beer cans at 100 yards. Don't use a benchrest. Offhand, sitting, leaning on trees or rocks...
If you can see the rear and front sights clearly, and have your rifle zeroed at 200 yards (about 2" high at 100 yards), you can kill any deer you can readily identify without binoculars. In other words, inside of 300 yards.
If you aren't going to practice, either limit yourself to 100 yards or buy some bolt action with a quality 4X scope...
But there's not such thing as too many rifles. (Or 1911s, but that's another forum.)
And yeah, weight's an issue--but my "pet" weighs as much as a Garand, and I plan on totin' it around this season...
, Art