A comparison of load data that is 40 years vs. today's modern load data :
_____________________________
Here is today's load data with Herco Powder.
.357 Magnum Handgun (Lyman Cast Bullet Handbook)
Warning! Notes: cases: Federal; trim-to length: 1.285"; primers: CCI 550; primer size: Small Pistol Magnum; Lyman shell holder: No. 1; cast bullets used size to .357" dia.; firearm used: Universal Receiver and Special Vented Barrel; barrel length: 4"; twist: 1-18 3/4"; groove diameter: .356"
Be Alert: Publisher cannot be responsible for errors in published load data.
Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS) Favorite?
158 Cast #358311 Alliant Herco 6.3 963
Remarks: sugg. start load; 18,700 cup
158 Cast #358311 Alliant Herco 7.9 1203
Remarks: max load; 41,000 cup
********************************************
Here is load data with Herco powder that is 40 yrs. old :
Lyman # 44 manual .........
Take a look at the Herco Load .
This is for the 357 Magnum :
I made the mistake , 40 yrs. ago, of loading 11.2 grs. of Herco with a 158 gr. cast in my Ruger Security Six in 357 Mag. cases.
I had to beat the cases out with a wooden dowel. Primers flattened.
I've always wondered what the pressure was. I'm glad I was shooting those rounds in a Ruger ! ! I'm also thankful that I nor my revolver were harmed.
Needless to say , no more of that load.
Ben
_____________________________
Here is today's load data with Herco Powder.
.357 Magnum Handgun (Lyman Cast Bullet Handbook)
Warning! Notes: cases: Federal; trim-to length: 1.285"; primers: CCI 550; primer size: Small Pistol Magnum; Lyman shell holder: No. 1; cast bullets used size to .357" dia.; firearm used: Universal Receiver and Special Vented Barrel; barrel length: 4"; twist: 1-18 3/4"; groove diameter: .356"
Be Alert: Publisher cannot be responsible for errors in published load data.
Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS) Favorite?
158 Cast #358311 Alliant Herco 6.3 963
Remarks: sugg. start load; 18,700 cup
158 Cast #358311 Alliant Herco 7.9 1203
Remarks: max load; 41,000 cup
********************************************
Here is load data with Herco powder that is 40 yrs. old :
Lyman # 44 manual .........
Take a look at the Herco Load .
This is for the 357 Magnum :
I made the mistake , 40 yrs. ago, of loading 11.2 grs. of Herco with a 158 gr. cast in my Ruger Security Six in 357 Mag. cases.
I had to beat the cases out with a wooden dowel. Primers flattened.
I've always wondered what the pressure was. I'm glad I was shooting those rounds in a Ruger ! ! I'm also thankful that I nor my revolver were harmed.
Needless to say , no more of that load.
Ben
Last edited: