Re: Lightweight deer gun
Anyone who uses a .243 will tell you that it will easily take any deer in this country. IMO it is the perfect deer caliber. I have larger, but seldom use them unless I am elk hunting. I have killed deer and large hogs well beyond 200 yards with mine with no problems. I use the 100grain loads and if you put that bullet where you are supposed to, the deer is going no where. And it doesn't matter if it is a northern whitetail or a West Texas deer.
You will not be disappointed with the .243 should you go that route. I would also recommend the used Ruger M77. They are great rifles.