just finished my chrono on my attempt to relicate the mil. standard 7.62x51( 168gr. bthp ) c.o.l. of 2.800
i got line from in here on using 41.5grs of imr-4895. fps was to be 2,550+,- 20.
i`m using a rcbs chrg. master combo to dispense powder. after careful calibration,
and using the above data it took me til 43.0 grs. of imr 4895 to reach 2,550fps.
my rifle to fire these is an armalite w/ 16in bbl. this may be why it took 2 extra grs.
to get to 2,550. but i saw no evidence of over pressure. next, i`m going to make a few of
these to check for accuracy. if no good, next i`ll try some re-15. sierra book says i believe
40.4 grs to reach 2,500 & 42.0 to get to 2,600fps. the later is their accuracy load.
let you know.