The Firing Line Forums - View Single Post - Anybody else heard of this "rule" of reloading?

9x45 · September 15, 2002, 06:34 PM

First of all, pressure is not a linear response. So a small increase in charge weight or OAL may result in a large pressure increase especially with fast powders and heavier bullets. Best bet is to start 10% below the powder makers published loads using maximum OAL and chrono your loads (same brass headstamp for same case volume). Depending on what power floor you are trying to make, USPSPA or IDPA, then find the most accurate load for your gun.

September 15, 2002, 06:34 PM	#14
9x45 Senior Member Join Date: January 14, 2000 Location: Southern California Posts: 1,089	First of all, pressure is not a linear response. So a small increase in charge weight or OAL may result in a large pressure increase especially with fast powders and heavier bullets. Best bet is to start 10% below the powder makers published loads using maximum OAL and chrono your loads (same brass headstamp for same case volume). Depending on what power floor you are trying to make, USPSPA or IDPA, then find the most accurate load for your gun.