Originally Posted by
doctnj
To address your first point. This is about the third run on my ocw with this being a fine tune. I ran several at .5 grains and .3 grain spreads already. That is the reason for such small increments. I wanted to watch where it opens up and verify where it was closed. That is why I originally stated that several of the results looked very similar and I only showed one. However the very next load started opening back up. So although this was the tightest group, it was indeed on the edge of the accuracy node. The SD's and ES's of the previous groups were quite similar. Until yesterday, I didnt know what walking a load up at .1 gr increments would look like. Now I do. I could be wrong in my reasoning, however I would think that running such a course test as .5, you could be stepping right over solid gold. Unless you happen to land on that single hole load.
As far as velocity, yes its at the extreme. And I am going to re run with bullets pulled back just to see if there is any additional improvements like drop in velocity and possible tightening of the groups. I would never continue to run a load that displayed signs of high pressure, especially multiple signs. I did clean the chamber last night and even the cases from the tightest group ran through extremely well. I know thats not the same however, when I did this same thing with my 338, the loads that were sticky were still sticky after the chamber was cleaned so again that gave me knowledge.
And lastly, this is a huge learning process for me. I want to see exactly what effects changing certain parameters have on the outcome at the range. This rifle is kind of my sacrificial lamb so to speak. Once my competition rifles are ready to shoot I will be moving over to them and starting over. Hopefully being able to transfer a lot of lessons learned. I wont be quite so abusive to them albeit I will more than likely find where my upper end in pressure is and then find a load below that.
This rifle will soon become a bit of a safe queen. I really dont want to shoot out the barrel. This is a limited edition so I would like to keep original parts on it at least for now. However if I do decide to pull it out and shoot it at some point, Ill know what to load up for it.
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