Speaking of lead.....and available data.
Over the last 20? years,there's been a huge increase in the number of mould makers"on the mrkt".To include co's that have design software that basically allows the consumer to have custom built.....pretty much anything he/she can think up?
Data?What data....you designed it,you figure it out.Just sayin,technology outpaced testing.
To what degree do cast boolits or customer designed molds have anything to do with jacketed bulletmakers or powder sellers?
I will admit that I don't know much about the smokeless powder market. I do know that Hercules, now Alliant is/was a manufacturer of powder and other explosives, but are Hodgdon's and Accurate? From what I understand, many powders are imported, like Varget and they can be made to order for different burn/pressure rates. Hodgdon got their start by selling surplus rifle powder and powders from de-milled ammunition.
As far as cast boolit handloading goes, the old standby loads of 10gr of Unique is kind of a joke; but usually is ballpark for nice mild velocity which is conducive to accuracy in the cast world. Hardcast boolits are viable at much greater velocities, but not typically delivering groups worth bragging about.
It is one thing to make and sell shooting gear and accoutrement, another to make and sell propellant and projectiles. Improper use of a scopesight, riflestock, and other gear will not contribute to a 60,000 PSI or greater destructive event if they are not properly utilized. Some bullet designs do engage more rifling area thus raising pressures significantly when compared to other bullets of different design but same weight. No two powders are "the same", except maybe H-110 & Win 296, which are re-branded. Powders of same construction can vary significantly by Lot #s.
To the degree that bulletmakers and powder sellers market their product to the individual handloader/reloader market, they should be expected to provide Guidelines For Proper Use of their product. In the not so recent past, this was Loading Data published in manual format which also contained basic and sometimes advanced (Sierra) instructions for safe loading procedures.
It is NOT safe loading procedure to trade load data as if it were an apple pie recipe.
The fact that anyone who might claim to be an informed user of ammunition loading products is unable to understand that sellers of dangerous products owe a duty to their customers to provide data for safe use of their product just establishes that such persons are dysfunctionally ignorant.
My own observation is that the Shooting Sports Industry is no longer the friendly place where all involved were first shooters and afficionados seeking to further develop and advance their knowledge and abilities. The business is now too big and there's too much money at stake to serve customers, so customers now need to utilize products only within the range of use manufacturer/reseller intended. This is seen with gun manufacturers voiding warranties when handloaded ammunition is used in their products and with the examples shown of bulletmakers and powder sellers not providing complete data for currently manufactured and popular cartridges.