“Your groups are too small” vs barrel life

[blksno]

If it won't shoot sub moa with 2 shots.....3 ain't gonna make it better.

When I'm starting out with INITIAL load work...this is my starting point. 2 shot groups to get an idea of pressure, powder charge and group size.
If I'm working up a series, and none in the series show promise with 2 shots...I don't need to re-test with 3 shots. I need to change a variable.
If pressure is good, and speed is good...I'll change seating depth or crimp and re-test with 2 shots toward the upper end of the velocity goal.

 

[nealm66]

This is similar to what I do. I rarely crimp though. Only sometimes on bullets that have a groove. I've had that help es/ds but never accuracy? Interesting

 

[VenatusDominus]

What I find telling from Keith Glasscock's video is that his highly specialized/customized F-class rifle is not the 0.175 MOA shooter you would assign from his 3 shot group, but is actually a 0.761 MOA shooter based on his 33 shots of that load. That should tell us something about our hunting rigs and our over estimation of their true accuracy.

 

[RegionRat]

It is amazing what a good F-Class shooter can do at 1000 yards. In a three relay match, that means sixty record shots and many times they pull pit duty or have to score between their next relay, so no time for cleaning or playing or fussing with seating bullets in between. So it represents pre loaded ammo. Here was a card shot in a match up in Alaska that was shared on the FB page the other day. It is an exceptional example.

600-42X means he was inside the X ring 70% of the shots. Some beautiful shooting to say the least, and shows what is possible when the planets are aligned.

Now it would be interesting to hear what John says the load/barrel will do on the next match, or if it falls completely out of tune.

ETA: folks have asked what the target dimensions are for F-Class at 1000 yards, for example the 10 ring is basically 10" and the X-ring is 5"