69 grain heads

M1rifleman · 07-12-2002, 03:41 PM

i was wondering if IMR 3031 can be used with sierra 69 grain BTMH head.....if so how many grains of powder?

M1rifleman · 07-12-2002, 03:42 PM

i mean in my AR15

carl · 07-23-2002, 08:37 PM

best i have founds so far is from an older sierra manual for 69 gr bthp match i use 26.2 gr of 748. this is giving me between 2900 and 3000 fps in a 24 in ar. i would suggest you reduce this to 26.0 gr as it is right about max pressure and starts to show signs of it in military brass.

07-12-2002, 03:41 PM	#1
M1rifleman Member Join Date: Apr 2002 Location: Cypress, CA Posts: 33	69 grain heads i was wondering if IMR 3031 can be used with sierra 69 grain BTMH head.....if so how many grains of powder?

07-12-2002, 03:42 PM	#2
M1rifleman Member Join Date: Apr 2002 Location: Cypress, CA Posts: 33	i mean in my AR15 __________________ http://www.subtlepassion.com/md/m1_sig.gif

07-23-2002, 08:37 PM	#3
carl Member Join Date: Mar 2002 Location: kc mo. Posts: 23	best i have founds so far is from an older sierra manual for 69 gr bthp match i use 26.2 gr of 748. this is giving me between 2900 and 3000 fps in a 24 in ar. i would suggest you reduce this to 26.0 gr as it is right about max pressure and starts to show signs of it in military brass.