Thread: Trying something, Eric Cortina method of load development

This time the summary is two words: pleasantly surprised.

Given the first depth-seating test series indicated a narrow node within the range and strong hints of a node at the end (longest jump-to-the-lands tested), I loaded up 3 each of:
2.193 and 2.196 (closer to the lands – approx. 0.017” and 0.014”)
2.168 (repeating the good result at the end of the last test series)
2.165 and 2.162 (two steps further from the lands)

The results show:
(a) a pleasing repeatability of the 2.168 group
(b) a broad node from about 2.162 to 2.168.



Given the Cortina instructions, I should now pick 2.167” as my seating depth.

I put the chronograph back on for the last 9 and recorded an average velocity of 2995, with an ES of 19 and a SD of 5.5, so pretty happy with that.

Thanks to all for your suggestions, comments and likes. Cheers, M