The reason I ask is that SAAMI specs for different calibers are independent of which rifle the ammunition is to be fired in ... right? For instance, the SAAMI spec for .45-70 is 28,000 psi regardless of which rifle is used. So how did they arrive at that? What are they basing that pressure rating on? Is it based on case separation for example? There must be a factor of safety in there too ... right?
It seems to me that any firearms manufacturer is going to look at the SAAMI specs for the caliber that they're interested in, then design the rifle to withstand pressures of the SAAMI spec multiplied by some factor of safety that they think is a reasonable compromise between cost, form, funtion, weight etc. It seems that ammunition manufacturers design their products not to exceed SAAMI specs (due to liability), but how about powder/bullet manufacturers and their reloading manuals? Would those companies such as Sierra, Lee, VihtaVuori etc contact the firearms manufacturer directly to find out the factor of safety in their specific rifle/handgun and then modify their load data accordingly?
It seems to me that any firearms manufacturer is going to look at the SAAMI specs for the caliber that they're interested in, then design the rifle to withstand pressures of the SAAMI spec multiplied by some factor of safety that they think is a reasonable compromise between cost, form, funtion, weight etc. It seems that ammunition manufacturers design their products not to exceed SAAMI specs (due to liability), but how about powder/bullet manufacturers and their reloading manuals? Would those companies such as Sierra, Lee, VihtaVuori etc contact the firearms manufacturer directly to find out the factor of safety in their specific rifle/handgun and then modify their load data accordingly?