Kanook said:
Oh.....Well when I develop a hot load like this one, I give it some thought ahead of time, it goes like this.
Whenever I do this, I first establish what is the weak link in the cartridge/gun combination.
In this case, it is not the gun because the chamber thickness is way way over what it would be in even the Redhawk.
It is not in the bolt locking lugs because the same rifle is chambered for the .44 Mg. which develops more thrust against the bolt face at 40K pressure than the .357 size case will at 55K, so from that I can take the rifle to be safe at 55K pressure.
Now, the question becomes how much pressure will the .357 Mg case withstand before it ruptures......that we don't know, BUT the brass case will give a lot of signs of excess pressure before it actually fails.
This is, in this situation, what to look for: By starting with acceptable handgun loads and working the powder charge up in incremental stages, looking for signs of pressure all the time, one can--in circumstances such as these--exceed the SAAMI pressure limits, sometimes by a good margin.
This is the reason for, and the justification for "Ruger only" and "TC Contender only" loads found in many handloading manuals.
It is not an exercise to be engaged in by the neophyte handloader, but it happens all the time. Without this sort of "envelop pushing" there would be few, is any magnum handguns today. 8)