Thread: Case neck sizing and effect on accuracy

Buggered if I know, you tell me.
My 6.5SAUM I neck size ( 2/3rd's of the neck) cleaned brass with a bushing die after turning the necks and trimming to uniform length. Anneal every time. Weigh each charge individually. Carefully seat the projectiles and check length etc. Gun shoots these into 1/2 to 1/4MOA depending on whether or not I am having a good day

Whereas I load range pickup 223 brass on my Dillon for my 6.5TCU including necking it up whilst de-priming at the first station. Powder measure fills the case at second station and bullet seated at the third. Shoots 1/4 to 1/2MOA Depending on whether or not I'm having a good day