I also suggest that you invest if you have not done so already, if your going to reload any ammo. to buy the Lymans # 48 or # 49 reloading manual which will cover most ammo reloading Max & Min safe loading Data & you can also go on line to GUNNERSDEN.COM which shows reloading specs for just about all cartridges, Hope this help's you out, Good luck with your new 243 win as it will make a fine white tail deer gun also. 8)