My personal favorite is my remington 700 sendero in 300 winchester mag.....I also have a ruger and savage 110 police both in 300 win. for my brush gun i use my marlin 444 great for close up shots........ as for the shot at 500 yds with the 243 hahahaha (thats not me laughing thats the deer when the bullet BOUNCES of his little brown a@$ and hits the ground.....) the boy can barely type so im questioning his ability to judge wind velocity and direction plus accounting for the natural drop of the bullet at 500 yds with his borrowed rifle...Personally i am comfortable shooting up to 400yds(not saying perfect cause i have missed at 90 yds broadside also with open sights) but i have been to a number of classes and basic long rifle training. And the handy laser range finder always helps....