I don't have that pressure "whodonit" information or where it was tested at hand. There are 68 odd pages of posts and the references(inferences) are somewhere toward the begining of the 12GaFH development...I think some of the testing was done byTom Armbrust but don't quote me. And maybe I mis-read, I don't discount that fact, it is easily done, Ed has a particular way of phrasing...but I have a recollecton of the phrase "the loads were sent off to a lab...", but it could have been in reference to another cartridge/load. I had some of my loads ready to sent to Tom but "S*** Happened" and I never got around to sending them. I know extrapolated data means diddly to some and working with it isn't for the faint of heart OR those with limited knowledge.
Some of the information or comments I made came from sources other than the 12GaFH thread...who knows where I read it...I've been studying ballistics for some 50 odd years, on and off the net, coupled with the experience of just plain building wildcats and extensive reloading, making mistakes specifically and unintentional and the experience gained from all that "stuff...it's all wrapped up together in my brain...I can't separate it out. I don't accept empirical data without question either, but I don't dismiss it out of hand, but try to gain some understanding of the processes leading to the conclusions and ALSO the ways the data can be manipulated to what ends..mostly the whys that people feel the need to be deceitful.
You and I and anyone that has gotten deep into the more esoteric areas of reloading/load development/experimental aspects well beyond the average advanced reloader, know some of the problematic aspects of the various pressure testing systems. Trying to explain all the nuances to the average person is akin to talking to your young kids...they can understand some of what you're trying to convey, but the rest just confuses them...and is one of the major problems with threads like this one...keeping it simple and not hair splitting or getting into a whizzing contest is very difficult, especially when this is NOT a simplistic area of discussion.
AND...just what is the usefulness of that esoteric hair splitting/data/information to the average reloader...it's all well and good to sit around a nice fire sucking on some excellent brandy and a cigar, pontificating over minutia.....but who cares, the average reloader just want a good hunting load. I tend to get very basic along those lines also...
My point was not how fine a point I could make, but the major point of safety and that there are many ways to go about the testing process. I'm from Missouri also when it comes to ANYTHING "I" haven't seen with my own two eyes and even then I know just how bad people are when it comes to testifying about "I saw it all, Judge..."
I reiterate MY points...the information was presented in a simplistic way to point out and stress the strengths and weakness of the NEF, and "reading between the lines" there are built in safety limits, that people will always exceed ANY limit, the loads/information/data I did publish were based on SOME previously tested data, from a source ANYONE has access to and can reach their own conclusions or from already published reloading manuals...not to begin a whizzing contest or start hair splitting.
Anyone wishing to delve deeper into this nebulous realm now has acces to the WWW...You Mac, probably/possibly and I for certain only had books...P.O. Ackley, Powley, limited ballistic publications, hands on testing with limited "scientific" tools and all the questionable information in whatever publication or author who were popular at the time, when we first started out on this road. Problem is there is MUCH more questionable information available on the WWW than I EVER thought possible.
I'm not interested in publishing ANY of my actual loads, sending them to a lab for verification, or sharing any data I MIGHT have tested with ANYONE. I have sufficient respect for my abilities to judge whether or not a load is safe or not. On occasion I will present a load that can be found in a reloading manual and I indicate that manual...most of the time...sometimes I slip up. You can find information on the 12GaFH on that forum, if you want to work through those 68 pages. you can read and infer some of the data from the Lyman Shotshell reloading manual, were talking about (437 gr = 1 oz) nothing more than 2-3 oz heavy mag loads...I already stated that somewhere in this thread...the loads are near or slightly over published loads and the processingof data through Load from a Disk and Powley computers or extrapolating/interpolating/infering from other manuals.
I don't claim to be an expert in ballistics, or experimental ammunition development, a gunsmith, etc., I just bindoonit for a very long time. I'm trying, many times unsuccessfully I think, to pass on some of that basic knowledge of HOW to safely develop known and unknown loads, all the many ways to build a standard rifle or wildcat, and do things that are NOT run of the mill and stay in one piece at the same time.
Hardly ANY of the wildcats I've built over the years had ANY reloading information readilyh available, and certainly NO testing lab data was available. Asking for lab data is nothing more, in my view, than a backhanded way of whizzing..."prove" it to me....I stopped proving ANYTHING to ANYBODY a very long time ago.
Ron...for what's it's worth, I work to the limits/pressure/proof load test of the RECEIVER, whoever has their neck on the line for that specific published data, with respect to the ALL cartridges tested for that receiver and ALL the specific parameter of those cartridges, NO MATTER and WHATEVER that pressure is....I don't much worry about the SAAMI specs for the CARTRIDGE per se if it is below the max working pressure of the receiver and if the working pressure of the cartridge CASE is more or less than the working pressure of the RECEIVER, THEN I ADJUST THE CASE PRESSURE UPWARDS OR DWONWARDS TO FITwithin the parameters of the RECEIVER...the RECEIVER is the part that will cause you the most damage if it decides to come apart.
I load my 45-XXX to a pressures BELOW what NEF says is good to go...I "garontee" most peole will hit the recoil limiting level BEFORE they hit the pressure limits..."most of the time". Start pushing the recoil up into the 60 plus ft lbs catagory and the average shooter will start whining loudly...and that is only about half what my 45-120 can produce with 750 gr bullets and thats's NOT a max load.
There is sparse data for the 45-120 other than for BP. The modern brass 45-120 case from Norma is just as strong as any other modern case. Simplistically thought, it is nothing more than a case with a specific volume and can be compared with ANY other case of similar volume. I use Load from a Disk and Powley computers to develop loads...you can do the same for th 45-70 or ANY other cartridge you have measurements for. If you are beginning to ask questions of the type you are, you need to buy one of the interior ballistics programs. They are the quickest and easierst way to start seeing the nuances of ballistics.
The resulting data will have pressures and velocities for whatever information you input or extract. It is much easier, simpler, quicker and safer than the "old" ways. The information is dependent on "garbage in, garbage out" in the original program, but if you are aware of this, it doesn't much matter, and EVERY man made software program is full of errors, so you DO have to think about the data, not use it without question and compare it with other sources.
I think this thread is becomming diluted and drifting away from the original question.
Luck