The SAAMI pressure #'s for the .22lr rounds , all of them , HS, StdVel, different bullet weights, hyper vel,,etc. all use the same max average chamber psi/ of 24,000.
FWIW,,.22WMRF is also rated at 24,000psi max average chamber pressure.
So why does it make any difference wether you shoot HV or StdVel 22rf ammo in any certain gun with regard to some safety factor?
Seems if the StdVel stuff pressure is the same as the HV rds, the gun should be safe with either....but it doesn't work out that way.
Early 22 rifles like the Marlin 97 crack bolts. Stevens pumps can do the same and their single shots loosen up their locking linkage.
I've seen it all happen , so I know it's so. I continue to use only StdVel in the oldies.
But why if the ammo generates the same chamber pressures and regardless of bullet weight and velocity of any of them?
My knowledge of physics is lacking...what am I missing.
https://saami.org/wp-content/uploads/2022/08/ANSI-SAAMI-Z299.1-Rimfire-2018-Approved-2018-06-13.pdf
scroll to page 13 of 89 for the 22lr info.
FWIW,,.22WMRF is also rated at 24,000psi max average chamber pressure.
So why does it make any difference wether you shoot HV or StdVel 22rf ammo in any certain gun with regard to some safety factor?
Seems if the StdVel stuff pressure is the same as the HV rds, the gun should be safe with either....but it doesn't work out that way.
Early 22 rifles like the Marlin 97 crack bolts. Stevens pumps can do the same and their single shots loosen up their locking linkage.
I've seen it all happen , so I know it's so. I continue to use only StdVel in the oldies.
But why if the ammo generates the same chamber pressures and regardless of bullet weight and velocity of any of them?
My knowledge of physics is lacking...what am I missing.
https://saami.org/wp-content/uploads/2022/08/ANSI-SAAMI-Z299.1-Rimfire-2018-Approved-2018-06-13.pdf
scroll to page 13 of 89 for the 22lr info.
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