Loaned a Chonograph & went to the range.
Loading .38 Special
I'm casting Lee 158 grain .358" SWC tumble lube,
3.0 grs. Clays, CCI small pistol primers
Two different C.O.L & two different revolvers
1.475" average velocity = 702 fps
1.445" average velocity = 754 fps
1.475" average velocity = 645 fps
1.445" average velocity = 690 fps
I was suprised to see the 50 fps increase with only a difference in the depth I seated the bullet. I seated them shorter than spec only becase the crip ended up on top of a tumble lube ridge. Why the diiference?
Any opinions on the bullet velocity?
By comparison Winchester (white box) 158 grain copper jacket
6" barrel Ruger
average velocity = 779 fps
2" barrel Taurus
average velocity = 680 fps
Lead fouling seems minimal
Bullets are dropping at 160 to 153 grains.
Still working on the hardness tester.