I got a set of dies when I bought the gun, I had to start somewhere with the brass! I was zreoing in my scope with the 140 rem ammo and would like to take a whitetail with the 160 Fed Accubond stuff , our season ends the 15th, I like to bloodie every new to me Winchester as fast as I can, Im 3 for 4 this year, a 59' mod 70 in 264, a 53 'win custom in 25-06, and a 48' transition in 06. No doubt the factory ammo will work well enough on a 300 yd whitetail. Any RX's you have on the 7stw will be appreciated , I know each gun is a different animal but I love to save time and barrel... very best