USING A CHRONOGRAPH IN HANDLOADING

[cvasqu03]

Thanks for bringing this thread back up, I'd completely forgotten about it.  Now that I'm finally past my comps, there are several things I'm planning to do before year's end.  One big project is my afore mentioned one of reloading every case/caliber I have.  I just got the 223 dies so I can at least begin re-sizing the 223 brass I have (probably won't start loading that one just yet).  Another project is to finally thread the barrels on my 7.62x39 Saigas so I can use my 30 cal suppressor so I need to try to work out some 7.62x39 subsonic loads. I've had the chronograph over a year and still haven't been able to use it due to time constraints so I'm glad I'll finally be able to put it to good use.

[MikeInTexas]

interesting!
My problem, the Speer #10 manual, the one I bought when I started reloading for my M29 S&W, showed 24.7 gr of W296 as maximum for the 240 gr Jacketed soft point AND the jacketed SWC. I worked up a load and settled on 24.4 gr.
When I was looking for powder, I noticed that Winchester said 24.0 gr was max for a 240 gr bullet. So I reloaded a batch with some of both bullets at 24.0 gr which I haven't fired any yet.
Then I dug up my Speer #12 manual and found that is says 24.0 gr of 296 is max for the 240 gr jacketed soft point, and to reduce by 1 gr for the 240 gr jacketed SWC.
So now I am concerned with my loads.
I think I need to chronograph both of them.

[CG]

Additional commentary and data on the use of velocity measurements.
Many side topics are brought out,  but that is for the reader to enjoy.

http://kwk.us/chronographs.html

cheers

[MikeInTexas]

Good reading, but now i feel like i know less than i did before!!!!!!