I need to be schooled. I’m new to precision rimfire. What is the ideal maximum velocity to stay sub sonic for accuracy. What are the theories behind ideal velocity from a rimfire?
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.22 LR sub sonic velocity
- Thread starter NorthWesterner
- Start date
I understand harmonics and each gun needs a particular load. I’m asking about maximum velocity before trans sonic zone causes issues.
As a general rule of thumb, I've always used 1100 fps as going supersonic. Environmental factors such as station barometric pressure and temperature will cause the actual fps to change a little
Some rifles shoot a good deal faster/slower than others. Highly polished bores shoot fast. Longer barrels shoot slower but in my expirence have smaller SD’s. Top end Eley ammo has a velocity on each box. It is an indicator buy has not matched the actual velocities I measure in my rifles.
I will chrono my rig along with group testing to get an optimal load. I’m realy just wondering what velocity people recomend staying under to remain sub sonic. I am hearing around 1050, that makes sense. Do cans seem to effect the velocity on .22?
You really do not have much choice with a rim fire. All comes back to what shoots best in your rifle.
I suggest you find the most accurate load you can justify paying for and shoot it. It will be subsonic.
I suggest you find the most accurate load you can justify paying for and shoot it. It will be subsonic.
I have found no discernible difference in velocity or accuracy using a quality can on a bull barreled cz 455
Your question depends on environmental factors. Under 1100 is safely subsonic. Over 1200 is safely supersonic. Where I live, 1135 is very safely subsonic, and 1150 seems to be subsonic as well. If in doubt... listen. Supersonic will be louder.
