Can I safely shoot .308 in a 7.62 K98?
- Thread starter Mr. Buttons
- Start date
Ya, it is a pet concern of mine because I see it cropping up all the time and I understand what keeps fueling it. I should realy take the material and edit it to be more coherent.
A sticky would be good.
A sticky would be good.
Last edited:
I was thumbing trough an older book and found this explantion of CUP pressure testing vs Pzieo transducer. In this test they took both readings from rounds tested. As you can see, the two different systems produced different numbers for the same pressures.
Average pressure in CUP was 46,600
Average pressure in PSI was 58,100
Before the introduction of the transducer, CUP readings were often referred to as PSI. Once transducers came into use, we were carefeul to differentiate between the two by using CUP or PSI to show which method were were referring to.
The military were not concerend about such niceties and continued to referr to their CUP pressure limits as "PSI". As you can see in the table below, this would create the impression that a military round was 46,000 psi but a commercial round was "hotter" because it is 58,000 psi.
As I said, it would be like thinking 100 kph is a lot faster than 60 mph.
According to another old document I found, when 7.62 and 308 were developed, the pressure limits were 50,000 CUP vs 52,000 CUP. Basically the same.
Average pressure in CUP was 46,600
Average pressure in PSI was 58,100
Before the introduction of the transducer, CUP readings were often referred to as PSI. Once transducers came into use, we were carefeul to differentiate between the two by using CUP or PSI to show which method were were referring to.
The military were not concerend about such niceties and continued to referr to their CUP pressure limits as "PSI". As you can see in the table below, this would create the impression that a military round was 46,000 psi but a commercial round was "hotter" because it is 58,000 psi.
As I said, it would be like thinking 100 kph is a lot faster than 60 mph.
According to another old document I found, when 7.62 and 308 were developed, the pressure limits were 50,000 CUP vs 52,000 CUP. Basically the same.
