- Sep 4, 2021
A randomized shot order seems to help smooth out extraneous variables. Whether or not it's significant, it still helps with confidence.
It would matter to me. There is no reason other than pure luck for your initial guess and tweaking only around it, to be the best.Pretty much. .020 or .040 seem to be a decent place to start for powder development. I don’t know that it really matters.
I guess I would say the 3 third group it came in, then went out after, don't like the vertical groups after that, but not sure what you have written but the last group it came back in , you might try going out a bit more with like 3 more settings after the last one. Also did you work with powder? My 6.5 CM delivers .20 groups with factory Hornady 143 ELD-X, and they are in my CM .060 off . unreal. sure like the last group, always like the ones that are more horizontal. Really nice groupsCurious how others would decipher this. I indicated distance off the lands on each picture, that’s not group size. I felt like I was shooting pretty well today. The only shot that felt off was in target 2 and I noted “pull”. I shot my 4th shot at .026” into the .029” target but the poi was in the same group as the .026, which was my best group of the day. I also noted 1st of the day. From these results I think my seating depth should be .023” which gives me some room as the throat erodes? I wouldn’t be scared of .020” either, especially with that first shot of the day being high, then 3 shots in a small group.
100 yards, 3” spot targets, prone of a bipod and rear bag. Very slight wind right to left. 6.5 creedmoor shooting 147 eldms. Gun is new to me but has 600 rounds through the barrel. Not sure if I worry about throat erosion at this point seeing it’s a 6.5cm and already has 600 rounds down the barrel.View attachment 365047
So let me see if I understand this....you work your powder charge, then intentionally screw it up to tune seating depth and then go back to the best powder charge? Then what? Re-tune the seating depth? What am I missing here?You end up doing both, just like Mike said. You can rough in seating depth before powder, but the depth tuning has to come after powder tuning and needs to be outside of the powder node.
I thought exactly the same thing. It’s a circle. Keep going round and round? If I find a charge it likes and a depth it likes, why would that be the wrong way to do it?So let me see if I understand this....you work your powder charge, then intentionally screw it up to tune seating depth and then go back to the best powder charge? Then what? Re-tune the seating depth? What am I missing here?
There's no circle. I shoot the seating depths at 93% of max charge, the odds of that one random charge being the best is pretty low. Shoot a pressure ladder to find the max load for the rifle, shoot a seating depth testing of whatever method, shoot a lot of powder charges at the best seating depth.So let me see if I understand this....you work your powder charge, then intentionally screw it up to tune seating depth and then go back to the best powder charge? Then what? Re-tune the seating depth? What am I missing here?