Originally Posted by boomtube
"I just got a Redding Comp seater for the 243AI so far groups are the same..."
If, and how much, improvement you see will depend a lot on how good your original seater was. Some conventonal seaters are quite good.
But, the sizers and cases themselves make a LOT of difference. No seater can make straight ammo if the necks are bent or not concentric.
I agree with you 100% to a point. You need a good rifle build right and the ability to tell if changes you make have an effect on group size.
Just buying Wilson dies doesn't automaticaly turn a rifle groups smaller it always been a combination of things. I have a press that has a locking spring device for the shell holder if I don't lock the shell holder it floats and I think it better aligns with threaded seating die.
Got to be careful that reloading doesn't become full time job.