Hello, I'm looking for opinions here so please bear with me. I currantly have a 7mm mag and a couple 308 rifles and I was looking to add in a 300 win mag. the purpose of the 300 would be for long range paper punching and a back up gun for elk hunting. With that being said does anyone feel I would not gain enough over my 7mm mag and should look at a diffrent caliber. I do reload but I'm not looking for some wildcat I could never get brass for or it so exspensive I wouldnt shoot it, example I was looking at the 338 lapua but the price on ammo and the issues I hear about reloading it made me shy away. Also I'm looking to do a semi-custom build for this rifle.