Hey fella a 243 is a fine cal, for hunting that you can fine. I like a scope because you can identify your target and if zero'ed properly, you can have a positive kill, and not wound. I once owned a see thru mount with a redfield 4X, It was very difficult to zero the scope, many time's I used the open range, and I had a good kill. It was mounted in a bolt action Winchester, 243. any time I used the Scope I used Kentucky windage. Never could get that scope to zero properly. Good luck and shoot clean! Sunny