Originally Posted by
JSnover
Western apparently hasn't read anyone else's manuals...
Ya mean like Lyman, that says this:
Lyman 48 page 99 says,
A soft bullet may cause higher pressure because the bullet is so malleable that the sides will push hard against the bore when high pressure is exerted on the base.
...and Hornady that says this:
230gr FMJ COL = 1.230. This bullet measures .651 inches.
230gr Lead RN = 1.245. This bullet measures .640 inches.
So the Jacketed bullet is .011 longer and is seated .015 deeper, for a total of .026 deeper.
Data.
N-340 Lead, Max = 6.6gr. Jacketed. Max = 6.7gr.
Even with the .026 deeper the jacked bullet used more powder.
Clays Lead, Max = 6.2gr. Jacketed. Max = 6.4gr
Even with the .026 deeper the jacketed used more powder.
231 Lead, Max = 6.2gr. Jacketed. Max = 5.7gr
Here the Lead bullet with less seating depth used more powder. Maybe due to COL, maybe due to the lead bullet.
Unique Lead, Max = 6.3gr. Jacketed. Max = 6.1gr
Again we have more powder with lead than we do with Jacketed.
...and Hodgdon says this.
.44 Magnum handgun--
240 cast/ 22.0 IMR4227/ 33,300 CUP
240 jacketed/ 22.0 IMR4227/ 28,400 CUP
.38-55 rifle--
250 cast/ 27.0 H322/ 27,000 CUP
255 jacketed/ 27.0 H322/ 25,500 CUP
250 cast/ 24.0 IMR498/ 36,200 CUP
255 jacketed/ 24.0 IMR4198/ 31,400 CUP
Please not that even though the jacketed bullet in the .38-55 weighs 5 grains more, pressures are less with the same powders charges. And in all the above instances, the STARTING load with jacketed bullets is the MAX load with cast bullets.
And THIS!
Code:
Jacketed IMR SR 4756 .451" 1.200" 6.4 762 12,900 CUP 7.0 867 16,500 CUP
Lead,IMR SR 4756 .452" 1.200" 6.3 813 14,200 CUP 6.8 892 16,400 CUP
Code:
Hodgdon Jacketed HS-6 .451" 1.200" 8.0 790 14,400 CUP 8.2 825 15,400 CUP
Hodgdon Lead HS-6 .452" 1.200'' 7.0 751 12,900 CUP 8.0 859 16,600 CUP
Code:
Hodgdon Jacketed, CFE Pistol .451" 1.200" 6.0 815 16,000 PSI 6.8 934 19,800 PSI
Hodgdon Lead, CFE Pistol .452" 1.200" 5.4 816 14,600 PSI 6.2 942 20,100 PSI
Code:
Hodgdon Jacketed, Universal .451" 1.200" 5.1 716 11,800 CUP 5.6 844 16,800 CUP
Hodgdon Lead, Universal .452" 1.200" 4.5 703 11,400 CUP 5.4 857 16,800 CUP
Code:
Winchester Jacketd, WSF .451" 1.200" 5.7 766 12,100 CUP 6.4 851 15,700 CUP
Winchester Lead, WSF .452" 1.200" 5.8 832 14,500 CUP 6.3 892 16,800 CUP
Code:
Winchester Jacketed WST .451" 1.200" 4.1 733 13,900 CUP 4.9 848 16,100 CUP
Winchester Lead, WST .452" 1.200" 4.0 776 14,300 CUP 4.3 812 16,400 CUP
I would suggest that those that disagree with Western Powders should take the time to Read Their manuals as well.
It would appear that those that disagree with Western would have to disagree with Hodgdon, Lyman, Hornady, Speer and just about every other $$Ballistics$$ lab that supplies us with usable data.
Read your manuals, really read them.