Thread: Testing a conventional approach to load development

Originally Posted by gimp

Thanks for reporting back. Can you post the targets?

I don't think it's terribly surprising - even if one is a believer in seating depth changing precision, the TMK is a tangent ogive bullet and not believed to be sensitive.

I've posted before that the order of effect size when changing variables, in my view, is something like this (gaps indicative of relative importance) :

Barrel quality (get a good barrel, properly chambered)



Bullet quality

Powder choice and how it interacts with specific bullet and barrel
Brass quality











--------unproven to be an effect-------------------
Any tuning of powder charge or seating depth






I'm not sure I believe there is such a thing as a genuine 0.5MOA rifle - using the definition of precision that refers to the full dispersion of the true cone of fire. I have yet to see any evidence that such a thing exists. Certainly in practical terms, the effect size of shooter error swamps rifle precision in the noise and no-one could actually take advantage of it in a hunting scenario

I didn’t keep the targets, but what I will do is take a few photos of the 10 shot groups that hopefully will be happening in the next week .
How do I get one of those apps that everyone seems to be using to measure their groups and get the mean radius info etc ?