Originally Posted by RufusG
Originally Posted by JOG
Other factors, such as hoop stress, are similarly reduced due to the .30 Super Carry's smaller diameter.


I wasn't so sure the diameter would offset the pressure in this case quite so nicely as for the bolt thrust, so found an online hoop stress calculator and played around with some numbers. It looks like if you take a 9mm barrel, and just make the hole smaller, the hoop stress is comparable to 9mm +P.


Something to consider is that a hoop stress value uses both the inside and outside diameter of the pipe/barrel. If the bore is decreased (make the hole smaller) while keeping the outside diameter the same the hoop stress can decrease even though the pressure increases.

Forgive me my nonsense, as I also forgive the nonsense of those that think they talk sense.
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