Sitting at 200 I shot a personal best. I don't really know how or why. Everything looked good and I concentrated on keeping the trigger moving. I had to relax my front arm over and over. 200X13. Two strings of ten shots in 60 seconds with a magazine change. 100X8 and 100X5.
300 rapid was adequate: 98X3 and 99X5. Total: 197X8.
Then 600. I shot EIGHT Xs out of 20 shots but only one 10. Most of the rest were in a small group at 8:00 on the nine/eight ring. I ruined a good day shooting with a 184X8.
I think some of the bullets were touching the lands and some jumping free. Probably need to seat them all a little deeper. 80 shot match. 200, 300, 600 yards. 771X30. Lotta Xs.
Update: I've got a Stoney Point Overall Length Gauge. Useless. You can't feel when the bullet ogive is touching the lands and I get wildly divergent measurements using a Sierra 80. Alan is going to check it with his. Supposed to be 2.42 inches. I'm going to try setting them at 2.40 or shorter. Everything short is working so it's a problem with the 80 Sierras.
Haven't cleaned the rifle since before th National Matches. Going to clean it right now for Alan's. Going up to count deer tonight.
Update: Explanation of the score in comments. Funny what you remember- I noticed how happy my feet were shooting prone at 600. Really had good position, especially those happy feet!
Update II: Alan used his bent Stoney Point OAL gauge on my chamber. Looks like I am loading long which would make some touch and some not. I'm going 2.42 and pushing the bullet into the lands never got that long. 2.40 max. Going to set them back and try a little more jump.