JGalt
Diamond Member
- Mar 9, 2011
- 76,376
- 96,075
- 3,635
From scrap wheel weights...
To ingots...
To bullets...
To paper.
125 grain .357 diameter powder-coated, fired from a 6" barreled Ruger GP100 .357 magnum revolver, 12 shots at 20 yards, from a sandbag rest.
Mixed brand .357 magnum cases, Remington No. 1-1/2 small pistol primers, 6.5 grains of 52 year-old Herco Unique powder, and an overall cartridge length of 1.651". Average velocity of 1156.50 fps, 368.41 ft-Lbs of energy, and Standard Deviation of 12.32. No noticeable leading in the barrel or forcing cone.
That 52 year-old Herco powder is like flaming dirt, but it still does what it was supposed to. I found a 5-pound can of it at a garage sale this Spring for $10. I could probably tighten up the group if I had a .358 bullet mold and sizing die. The largest ones I have cast and size to .357, which is better for 9mm.
To ingots...
To bullets...
To paper.
125 grain .357 diameter powder-coated, fired from a 6" barreled Ruger GP100 .357 magnum revolver, 12 shots at 20 yards, from a sandbag rest.
Mixed brand .357 magnum cases, Remington No. 1-1/2 small pistol primers, 6.5 grains of 52 year-old Herco Unique powder, and an overall cartridge length of 1.651". Average velocity of 1156.50 fps, 368.41 ft-Lbs of energy, and Standard Deviation of 12.32. No noticeable leading in the barrel or forcing cone.
That 52 year-old Herco powder is like flaming dirt, but it still does what it was supposed to. I found a 5-pound can of it at a garage sale this Spring for $10. I could probably tighten up the group if I had a .358 bullet mold and sizing die. The largest ones I have cast and size to .357, which is better for 9mm.