In the interest of saving money and time, do you have suggestions on what information I can get from factory ammo that shoots well in my rifle? I shoot a 300wsm and was very happy with 5/8th to 3/4th inch groups at 100 with a Browning A-bolt out of the box with winchester factory ammo. I've since started load development, and haven't had anything under 1.5" so far. With so many variables in components and die settings etc, I'm looking for usefull information I could gain by any measurements of the factory ammo. Would bullet seating depth be usefull if not using the same bullet? What about other case dimentions? Knowing the velocity helpfull? Powder charge weight if the same powder is not available anyway? There's much great info here, I found some good info by searching, but would like more help.