Originally Posted by ReDnEcKBoHuNtEr
I bought a chrono the other day and loaded up my 35 gr VARGET with a 55 grain bullet and cci primers(for my 22-250). i trickled the powder and the biggest difference was .1 (35 gr compared to 35.1)...i used all the same REMINGTON casings
when i shot it through the chrono i was getting different readings... i shot 5 shots and they went from 3599-3626....is that going to be a problem. i really only want to have an accurate drop chart out to 500 yards as i am also working on a 7mm-08 project. Is there something i did wrong to get different readings or is that 27 fps difference not going to be a problem when shooting at 500 yards
27 ft/sec is not bad for light 22 cal bullets but you will want to get in the 10 to 15 area to
Standard deviations are a indication of load quality. (The lower the SDs The better the load).
If you can get in the single digit SDs (.09 - )you are home.
The larger/heaver bullets of the 7/08 should be easier to get lower numbers.
Always use 5 or more shots to calculate SDs and ESs.
J E CUSTOM