When did SAAMI update 32 H&R Mag?

[Mr_Flintstone]

Just wondering if anyone noticed when they changed the standard for 32 H&R Magnum. I was looking up a couple things in the new SAAMI standards, and I noticed that they now have transducer standards in addition to crusher standards for 32 H&R Mag. I was surprised that they now list 23,000 psi as max pressure. I always thought it was assumed to be somewhere around 20,500 psi, but I may be thinking about CIP. Most manuals always listed CUP pressures. The highest PSI pressure I have ever seen in a manual was 20,400 psi from Alliant.

 

[GeoDudeFlorida]

Just wondering if anyone noticed when they changed the standard for 32 H&R Magnum. I was looking up a couple things in the new SAAMI standards, and I noticed that they now have transducer standards in addition to crusher standards. I was surprised that they now list 23,000 psi as max pressure. I always thought it was assumed to be somewhere around 20,500 psi, but I may be thinking about CIP. Most manuals always listed CUP pressures. The highest PSI pressure I have ever seen in a manual was 20,400 psi from Alliant.

Interesting. I wonder why the change now when the .327FM is supplanting the little H&R cartridge in pocket revolvers?

FWIW my “pressure standard” has always been based on a 90gr JSP/JHP at 1000-1100fps from a 4-5/8” Ruger Single-Six. Even the lower-dollar Taurus and Charter revolvers seem to be able to manage that load without sticking or losing accuracy.

 

[mcb]

According to the spec it was updated in 2022. Each manual gets updated on a rotating 4-5 year cycle. They did not change the pressure so much as one of the SAAMI members took the time and effort to do the measurements with a transducer system and give that data to SAAMI. It is the same as it has always been a MAP 21,000 CUP and in this cartridge that apparently equates closely to 23,000 PSI (trans). They do round off most of the pressure data to the nearest 500 psi.