The Firing Line Forums - View Single Post - Less powder with lighter bullets to prevent over pressure

dgang · November 7, 2019, 04:35 PM

While loading some 7.62x39mm with 125gr. FMJ using 30gr. of H335 I noticed Lee's load guide advising not to use that amount of powder with a lighter bullet in order to avoid overpressure. It seems contrary to my experience. I thought a heavier bullet of the same construction requires less powder to keep the pressure at safe levels.
Does anybody have an explanation for this contradiction?
Thanks in advance, dgang.

November 7, 2019, 04:35 PM	#1
dgang Senior Member Join Date: April 14, 2000 Location: Colorado Posts: 204	Less powder with lighter bullets to prevent over pressure While loading some 7.62x39mm with 125gr. FMJ using 30gr. of H335 I noticed Lee's load guide advising not to use that amount of powder with a lighter bullet in order to avoid overpressure. It seems contrary to my experience. I thought a heavier bullet of the same construction requires less powder to keep the pressure at safe levels. Does anybody have an explanation for this contradiction? Thanks in advance, dgang. __________________ I shoot, therefore I am.