Was able to get in some range time this past weekend. I still have to look at the data closer, but seeing progress.
I am transitioning to Lapua brass and implementing the dies that I bought specifically to be able to have more refined sizing and boolit seating. Another adjustment is implementation of an expander mandrel to get more consistent neck tension. I have a PMA Tool expander mandrel and die body. The mandrel calipered out to 0.03065.
I changed out the trigger to a TriggerTech Special 2-stage. I really like this trigger. Not that the Geissele was bad, just wasn't quite what I wanted. I'll have to tweak the trigger pull, or get used to it, but overall it was great. I noticed that on my digital trigger pull gauge that the spread of the TriggerTech was much less.
Some highlights from this past weekends range session:
1) Have noticed the SD in the test batches seemed to have done down when compared to previous tests with the same boolit and powder charge, but different brass and boolit seating depth. I had one SD down to 2.4. I'll have to compare the before and after implementing the expander mandrel, but from what I recall, all of the SDs were lower.
2) I had gone with boolit seating depth to get the COAL able to fit in my Accurate Mag mags. They have a little bit more space than my Magpul mags. I assumed that that was the controlling dimension. Noticed the second round in the mag would hang up. I tried to check to see if the rounds were getting hung up inside the mag, but that was fine. Anyways, when I got home, I noticed that there's a slight lip below the feed ramp where the mag body hits a "stop". The lip has a very slight overhang over the mag front lip, which catches the tip of the boolit. So I will have to reduce the seating depth a bit and try again. I am planning on doing seating depth tests and going toward the 2.800" COAL, but I do want to do the powder charge testing on the max length. So a little bit of tweaking to go.
The annealer came in, so I'm pretty close to complete with everything for the whole process that I envisioned. I will likely do another round of initial testing with new Lapua brass and then get into the powder charge testing for the combo that I decide on. Right now, it's between 8208, Varget, 4064, and H4895 for powders, and between Berger 168 gr and 175 gr. Sucks that the Berger 168 gr are way harder to find than the 175s. I have some 168s and there are a couple of vendors with them in stock, but around 30%+ higher prices. So I am trying to hold off until other vendors get some in stock.