Thanks for the responses and more encore 300 mag questions

[pastor steve]

I have had it chronagraphed, I believe I am shooting the same way each time. Have any of you all had any head space problems? I am loading a 168 ct ballistic tip nosler. Have any of you used this load and would you share your specs with what is working for you, like type of powder and how much. My factory remington 150s group 1/2 inch at 100 but all my problems come at 200 or more. don't get me wrong I love my Encore as I have used it for years in 50 cal muzzleloader and get 1/2 ich groups at 100 all day long. I just leave soon on an antelope hunt and want to be able to shoot 300 yrds with confidence. Thanks for your help and ideas.

[5Redman8]

When it was chronographed, what was the standard deviation for a 5 shot string and then a 10 shot string?

Have you duplicated your 1/2" 100 yard groups since you have shot at 200 yards?

I will be honest, I have seen some loads go from 1/2" at 100yd to 2" at 200yd but that was associated with a large SD.  A six inch difference is a significant change in something?

Kyle