why do i have you use sub sonic ammo in semi auto 22?

sorry guys if this seems like a simple question but i wondered why? is it to do with the clearing of ammo(less jamming)? or am i missing sumthing?
i have a magtech semi auto 22?

thanks for your help

I doesnt understand question your?

Yeh I am with Tussock on this. You have been mislead. In fact you are more likely to experience a jamming problem with the subsonic than you would with supersonic rounds.

Is it suppressed? Cause some of the cheaper .22 suppressors get damaged if you use HV ammo. Other than that HV is all I use in my .22 semi.

If the recoil spring has been weakened to fire subs reliably then it may be too weak to fire high velocity.

Is it a 10/22? Just shoot the bloody thing imho.

Could be they come standard with a light recoil spring & not designed for HV ammo .
I needed to get the spring in my Stirling lightened to function properly with sub;s
opposite of what you're saying .
Was it a dealer that told you that ? If it was I'd ring him & ask why .

I use HV in my magtech without problems

yeah it was gun city said i only want sub sonic for it? and i wondered why, have been into h&f today and they said its ok to use either, so i got some of both this time to try

Some more fantastic Gun City advice:D

Does it have a suppressor

I think you may have gotten your wires crossed with the advice. If its supressed then you were probably told that only subsonic ammunition will supress in the rifle. High velocity is still fine to use but still travels above the speed of sound hence the crack of the round. Nobody who works in a gunshop should have told you you can ONLY use subbies through it unless they were refering to keeping the gun quiet.

^ what he said. But I do wonder judging by the level of communication in this thread if the mis-communication isn't entirely unexpected :D