cjmac
Silver $$ Contributor
So its been a long year , IV been everywhere on this earth with work .. So with my 223, 1 in 7 twist Im wanting to try imr 4166 and n140 with 77 gr SMK. From what I understand from Dan Newberry ocw methods are . With different charges at different targets fire groups allow time to cool between shots
. Seating depth at this point is not critical but make the same length. It can be tuned later . ( would I be better off to start at mag length OR just off the lands ? )
Look at the groups , you want the groups that are consistent in same position on the target lets just say 3 groups 19.0 , 19.2 , 19.4 landed at 12 o'clock , and 2 groups landed at 9 o'clock
At this point I would want to test 19.2 again ? Maby shoot 5 more groups and see if that land at 12 o'clock again ? That would be a good load ?
Then start adjusting my seating depth ..
. Seating depth at this point is not critical but make the same length. It can be tuned later . ( would I be better off to start at mag length OR just off the lands ? )
Look at the groups , you want the groups that are consistent in same position on the target lets just say 3 groups 19.0 , 19.2 , 19.4 landed at 12 o'clock , and 2 groups landed at 9 o'clock
At this point I would want to test 19.2 again ? Maby shoot 5 more groups and see if that land at 12 o'clock again ? That would be a good load ?
Then start adjusting my seating depth ..