here is my load data for the 5.56 military pull down 62 gr fmj bullet. these rounds were chronograph at 15 feet from the barrel. i used a 16 inch ar-15 that i build from mix and match parts. i am going to test these loads next month in my 20 inch colt. i used two powders, imr 4895 and wcc 846 (military pull down powder). i started low and worked up to get the load that was close to factory ammo that i tested through the ar. i used wolf primers on this lot. o.a.l. was 2.240/56.90 +/-. base line factory ammo was american eagle 62 gr fmj. it ran 2,783 fps. i tested other factory ammo, but like where and how the american eagle ran across the chronograph.
imr 4895
24.0 - 2,473 fps
24.5 - 2,553 fps
25.0 - 2,618 fps
25.5 - 2,682 fps good load and group.
26.0 - 2,713 fps best load, very good group, no primer flatting.
wcc 846
23.0 - 2,473 fps
24.0 - 2,698 fps
24.5 - 2,733 fps
25.0 - 2,862 fps good load, good group.
25.0 - 2,912 fps good load, very good group.
26.0 - 2,956 fps best load, very good group, no primer flatting.
i also did some 55 gr 5.56 military pull down bullets with wcc 846 with wolf primers. o.a.l. - 2.220 +/- .
wcc 846
25.0 - 2,813 fps
25.5 - 2,851 fps
26.0 - 2,954 fps best load, very good group, no primer flatting.
now these are my reloads and my tests. use them as a base line for your tests. all way start low and work up. hand drop and weight each of your test loads. check your primers after each firing for over pressure signs.
