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

T. O'Heir · November 8, 2019, 12:32 PM

"...Lee's load guide..." Lee does no testing, of any kind, themselves. Most of their data comes directly from Hodgdon or the powder maker. They do not just help themselves though. That'd violate copyright laws. They buy it and publish it as their own. Which is bad enough.
30 grains of H335 is the Start load for a jacketed 125. 28.8 is the MAX load for a 108. You'd never use the same amount of powder for 2 different bullets. Do not mix load data.
The odd part is that Hodgdon's site(that's kind of questionable anyway) shows the 108 Max pressure as being higher than the 125 Max load. (The SAAMI max pressure for a 7.62 x 39 is 45,000 PSI. There is no converting CUP to PSI using mathematics.) Likely because the 108 is a Barnes Frangible, powdered-metal, copper-tin, core inside a guilding metal jacket bullet. Those are not the same as a lead cored bullet.

November 8, 2019, 12:32 PM	#7
T. O'Heir Senior Member Join Date: February 13, 2002 Location: Canada Posts: 12,453	"...Lee's load guide..." Lee does no testing, of any kind, themselves. Most of their data comes directly from Hodgdon or the powder maker. They do not just help themselves though. That'd violate copyright laws. They buy it and publish it as their own. Which is bad enough. 30 grains of H335 is the Start load for a jacketed 125. 28.8 is the MAX load for a 108. You'd never use the same amount of powder for 2 different bullets. Do not mix load data. The odd part is that Hodgdon's site(that's kind of questionable anyway) shows the 108 Max pressure as being higher than the 125 Max load. (The SAAMI max pressure for a 7.62 x 39 is 45,000 PSI. There is no converting CUP to PSI using mathematics.) Likely because the 108 is a Barnes Frangible, powdered-metal, copper-tin, core inside a guilding metal jacket bullet. Those are not the same as a lead cored bullet. __________________ Spelling and grammar count!