loading some .308s for a friend since he lets me hunt his land.
Remington 700
sierra pro hunter 150 gr. sp #2130 bullet length 1.058"
mixed lot of brass length adjusted to 2.010 (right between max and min of 2.005 and 2.015)
using lee dies in Herter's super #3
my question has to do with COAL and seating depth. My Hornady 9th says max COAL is 2.810. If I seat a bullet and chamber it to see maximum the gun will allow I come up with 2.920. Then if I seat it another 0.015 it comes to 2.905. at that length the bullet is in the case only 0.163. Normal rule of thumb I understand is to have at least a full bullet diameter in the neck. At a .308 seat depth there is 0.750 sticking out above brass and have a COAL of 2.766. That leaves the bullet with a 0.139 jump to the rifling, about an 1/8" more than I would like. The most the internal magazine will allow is 2.820
to summarize it
2.920 is chamber and has
2.905 is ideal
2.820 is magazine
2.810 is SAAMI spec
Normally a guy would consider this to be good enough to shoot minute of deer but this guy knows how precise I was with my .270 loads and the accuracy he has seen astounded him.
Remington 700
sierra pro hunter 150 gr. sp #2130 bullet length 1.058"
mixed lot of brass length adjusted to 2.010 (right between max and min of 2.005 and 2.015)
using lee dies in Herter's super #3
my question has to do with COAL and seating depth. My Hornady 9th says max COAL is 2.810. If I seat a bullet and chamber it to see maximum the gun will allow I come up with 2.920. Then if I seat it another 0.015 it comes to 2.905. at that length the bullet is in the case only 0.163. Normal rule of thumb I understand is to have at least a full bullet diameter in the neck. At a .308 seat depth there is 0.750 sticking out above brass and have a COAL of 2.766. That leaves the bullet with a 0.139 jump to the rifling, about an 1/8" more than I would like. The most the internal magazine will allow is 2.820
to summarize it
2.920 is chamber and has
2.905 is ideal
2.820 is magazine
2.810 is SAAMI spec
Normally a guy would consider this to be good enough to shoot minute of deer but this guy knows how precise I was with my .270 loads and the accuracy he has seen astounded him.