How To Calculate Your Harmonics

[CharlieNC]

@CharlieNC
This is the most impressive assessment application I've seen in a long time. Very interesting to say the least.
Already gather the same data for my own data assessments, and looking forward to extrapolating it to your model concepts as well, for further assessment value.
Very much appreciate your work and time spent. Thank You for sharing !.!.!
Donovan

Thank you Donovan, I have learned a great deal on this site and enjoy sharing from those who are much more experienced than I. As always I am happy to assist you with any useful application as you wish. Maybe I'll make it out to shoot with you some day!

 

[Nobody]

Looks like I chose my handle very wisely.

 

[Alex Wheeler]

Alex I have endeveored to provide a clear demonstration of positive compensation, vs the often debated assertion that a node is at the top or bottom of the cycle. As a shooter and gunsmith, do you see any value in the method I have proposed to quantify the harmonic of a barrel? I was hopeful such a quantification could be used to ultimately better understand barrel design and load development. Having worked in r& d for years with the axiom "if you can't measure it, its tough to fix it."

I think you did a good job putting a number on your barrel/load. I think a guy could study this his whole life and still keep learning. I know I learn or see something new constantly. Powder burn rate has a large effect on compensation. For example, same barrel, and velocity window, 2 different powders can show very different compensation characteristics. One many put a 1 grain spread of shots into 5" at 1k, while the other may put that same window in 24" of vertical. Barrel length and powder burn are critical for PC. I liked your report. Unfortunately, change powders and it will be totally different. There are other things that effect PC greatly as well. Anything that can take the exit timing out of the sweet spot will cause you to have a gun that will not compensate. You mentioned ocw. I cant say Im a fan of it for LR tuning. The really good PC nodes are tiny vs the relatively wide nodes found using ocw. The father out you go, the smaller that pc point gets. Which makes sense if you look at the trajectory and "overlap" as we call it.