Thanks Gaintwist. I had a great time and highly recommend the CMP matches at Camp Perry for those interested in that type of shooting.
My rifle is something we recently built in our shop and of course put all of our newfound knowledge in.
I chose a PQP 2500X action for the build. The day before it arrived I asked Jerry Stiller if there was enough tang to allow me to mount an Anschutz trigger (I use these on all of my prone guns). He said he didn't think so. Well, things came together well and I sent him a picture about 7 pm the next evening of his action with the Anschutz trigger mounted to it. It has worked marvelously.
The stock is a Tec-Hro. I've used these on a couple of my centerfire guns as well as for customer builds. They use a big inelt and adapter blocks to hold a wide variety of actions. I chose to start with the adapter for the round Anschutz 54 family. This particular block allowed me to put the action quite far back in the stock. This makes the loading port easier to reach in prone.
For the barrel I was able to grab a Muellerworks 1-16 twist 8 groove, 26" long. It's been a shooter right from the gate. The chamber is the old standby Winchester 52D. It shot a wide variety of ammo well. In testing I found a lot of Center X and a lot of Tenex that both shot very well. As I tested these 2 lots I couldn't really determine a winner. I chose to shoot the Tenex at this match. It happens that another of my guns shoots this lot very well so I can share the ammo between the two guns.
The tuner is an Uptagrafft Tuner Tube, 12" long. We use these to extend the front sight out from the muzzle. For my aging eyes it makes the front sight a little sharper. The ability to tune is a big plus.
Accuracy at 50M averaged just over 13mm outside ot outside. While we have seen some smaller groups I have been very pleased with the consistency of the accuracy. Across multiple groups it didn't vary much.
As it happens I shot the inital lot testing with the tuner set at #500 which is where it came out of the box. Let's call this a random setting. The next day I realized I had a good testing opportunity. I shot the rifle with the whole tube/tuner removed. The rifle selected the same lots of ammo, but the group sizes were all larger by about 11%. The following day I reinstalled the tuner and tested it out. Compared to the random setting, I improved the accuracy by 3-4% I think it is. I ended up with the tuner set to #100, so it wasn't like the random setting ended up being close to the optimal.
Concerning the tuner test, I shot it at setting 0, 50, 100, etc on to 500. The rifle shot its best at 50 and 100. I split hairs between thsoe two settings but franly couldn't see any significant difference across a number of groups. All groups were 10 shots each, and I shot more than 1 group at any promising looking setting. In the end, I set it to 100 and started working on position and wind reading and those important things. I'm not saying this is the best way to tune or anything, just reporting what I did.