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So I'm loading some 30 carbine for my Ruger Blackhawk
and I decide to check a couple manuals
And here's what I find. Using 110gr bullet soft point round nose or FMJ
Pistol loads 7.5" barrel in Sierra book 10" barrel in Hornady book
Sierra #14 c2007 Alliant 2400 min charge 11.7gr = 1385fps Max charge 12.7gr = 1476fps
Hornady #8 c2010 Alliant 2400 min charge 8.9gr = 1300fps. Max charge 13.0gr = 1700fps
Now compare to the carbine loads 18" barrel
Sierra #14 c2007 Alliant 2400 min charge 10.0gr = 1469fps Max charge 12.0gr = 1745fps
Hornady #8 c2010 Alliant 2400 min charge 10.9gr = 1700fps Max charge 12.2 gr= 1900fps
Now since the only factory loads available for any handgun in .30 carbine are in fact carbine loads, it must mean that the handguns are built to handle factory carbine loads. And knowing the pressure is relieved sooner in a short barrel then a long barrel. If the handgun can handle the carbine loads you can reload to carbine pressures and not be at risk.
So why do the reloading manuals so greatly under rate the amount of powder that can be used?
And why does one manual show such a lower allowable Max for the same powder and ball?
Military loads for the .30 carbine cartridge are 15grs of H110 or Win 296 resulting in 1990fps
and I decide to check a couple manuals
And here's what I find. Using 110gr bullet soft point round nose or FMJ
Pistol loads 7.5" barrel in Sierra book 10" barrel in Hornady book
Sierra #14 c2007 Alliant 2400 min charge 11.7gr = 1385fps Max charge 12.7gr = 1476fps
Hornady #8 c2010 Alliant 2400 min charge 8.9gr = 1300fps. Max charge 13.0gr = 1700fps
Now compare to the carbine loads 18" barrel
Sierra #14 c2007 Alliant 2400 min charge 10.0gr = 1469fps Max charge 12.0gr = 1745fps
Hornady #8 c2010 Alliant 2400 min charge 10.9gr = 1700fps Max charge 12.2 gr= 1900fps
Now since the only factory loads available for any handgun in .30 carbine are in fact carbine loads, it must mean that the handguns are built to handle factory carbine loads. And knowing the pressure is relieved sooner in a short barrel then a long barrel. If the handgun can handle the carbine loads you can reload to carbine pressures and not be at risk.
So why do the reloading manuals so greatly under rate the amount of powder that can be used?
And why does one manual show such a lower allowable Max for the same powder and ball?
Military loads for the .30 carbine cartridge are 15grs of H110 or Win 296 resulting in 1990fps