Definitely need to be able to look at neck tension with more than one bushing once you have the powder and seat depth figured out if the groups are not where you think they should be. Annealing may be of help as well. I never anneal so I could not be of any help there.Right now I'm taking the chronograph numbers with a grain of salt. I'm using a 25 year old beta chrony and it isn't the most consistent thing especially when it's cloudy. I'm hoping to get the new caldwell velociradar soon. To measure I use my lyman gen6 and have it throw .2 grains low. Then I trickle the rest by hand on my digital scale.
I had planned on loading .008" .010" and .012". The reason I don't shoot 3 shot groups is more than one of those groups would have passed QC if I had only shot 3. It was the 4th and 5th that opened up.
I only have the one bushing right now. I'm using a .268 bushing. I'm also thinking of trying some different primers. Seems like I was getting better numbers with my cci primers than I am with the federal. I've got cci 400, 450, remington number 7's and Fiocchi standards.
I'm thinking I need to anneal my brass. I've got plans drawn up for an induction annealer. I just need to get the parts for it. Unfortunately everything costs money lol. Trying to decide the order of priority for a rest, new chrony, new scope, annealer or auto trickler v4?