.22lr chamber pressures. . .

[fat tony]

I am aware that SAAMI MAXIMUM PRESSURES for the .22lr are 24,000 PSI or CUP either one, not sure.

I am not really interested in the SAAMI max pressures chart figures, I am interested in what the ACTUAL figures are for:

Remington subsonic .22lr

Winchester "silver box" .22lr target with the red x on them.

Winchester Dynapoint .22lr

Winchester 333 .22lr

Thanks.

Seems this is a more closely guarded secret than what colour the pope's underwear is. . .

 

[Blastattack]

Only question I can think of is why would it matter? I highly doubt that you will find exact numbers, does any manufacturer of any ammo publish so called "exact" PSI values?

 

[fat tony]

No, not that I know of, which makes the information all the more tantalizing. Blast this litigous world and the vast herds of ambulance chasing lawyers!

It might matter if you want to still shoot your old .22s but want to keep them on a nice and easy diet for these senior guns.

 

[guntech]

I doubt it is a secret... just data that no one has bothered to compile and place on the internet. Some of it may not even exist.

 

[trevj]

It might matter if you want to still shoot your old .22s but want to keep them on a nice and easy diet for these senior guns.

Stick to those cartridges marked as Standard Velocity or lower (1100-someodd) FPS. Steer clear of anything marked as High Velocity, and the old guns will be fine.

Most of the Target ammo is standard velocity stuff too. SAAMI only cares about maximums, does not mandate that the makers produce all the ammo to them. Short of writing a letter and asking, your only other option is to shell out a bunch of money on a test rig and measure it yourself. Which will give you a valid point of data for that lot only, as it all may change with the next truckload of powder at the plant.

I'm liking the CCI Quiet ammo, these days. 40gr bullet at 700 fps.

Cheers
Trev

 

[clatartar]

Tighter chamber=higher pressure....

 

[rnbra-shooter]

...snip...

writing a letter and asking is the most sensible and direct way of getting the answer to OP seeks.

a test rig and measure it yourself would work too. If you were 5000km close to me I'd suggest that we set up a date at the range (I could dig out and dust off my strain gage gear. I've measured .223s and .308s but I've never measured rimfire ammo with it).