Posted by Stuart Pethy on
URL: http://oldforum.flyshooter.com.au/load-testing-question-now-with-part-2-tp5707756.html

hi guys
just a question about what you guys look for in your load testing as I keep hearing different ways to go about it eg look for groups, chose the best ES and SD etc

I used a magnetospeed v3 the other day just to see what my load testing was doing as I have swapped to 2208 and 105gr hybrids in my 6BR, 1st time using a chrono to test my loads
these shots were at 200m in slight breeze from about 45 behind me and with slight mirage, was set to 300m to test but mirage was too bad so brought it in to 200m
are you guys looking for good groups between 2 different charges eg hitting on the same centres or are you using your chrono reading looking for single numbers for ES and SD
and then adjusting your seating depths to bring in groups, then neck tension, primers etc

these were set up with .002 neck tension, .010 off the lands and yes I do believe the magneto speed does affect the groups as its attached to the barrel but I just wanted to get speeds and have a new set or rounds to test with magneto off  
see  pic for same load tested with and with out magneto (Left on Right off)



started to get pressure at 30.8gr slight extractor marks starting



29.6gr
min 2852
max 2864
avg 2858 SD 5.0

29.8gr
min 2863
max 2878
avg 2872 SD 6.8

30gr
min 2879
max2894
avg 2884 SD 6.8

30.2gr
min 2901
max 2917
avg 2905 SD 7.5

30.4gr
min 2913
max 2918
avg 2916 SD 2

30.6gr
min 2936
max 2945
avg 2939 SD 4.1

30.8gr
min 2953
max 2983
avg 2969 SD 12.6


like I said I will be retesting on Friday without the magento speed on there and will post up results