Thread: Subsonic 22lr going supersonic?

If your shooting with oil in your barrel you run the risk of bulging your barrel (if you havent already done so) .oil can cause excessive pressure which can alter the burn time of your powder which may account for your supersonic results. I use CCI extensively (about 8K )in the last 10 months with consistant results. I clean after about 500 rounds and never shoot with an oily action or barrel. Clean clean clean. Extraction problems are generally caused by oil and powder residue. I oil only if I am not going to use use my firearms for a while.

Originally Posted by Driverman

If your shooting with oil in your barrel you run the risk of bulging your barrel (if you havent already done so) .oil can cause excessive pressure which can alter the burn time of your powder which may account for your supersonic results. I use CCI extensively (about 8K )in the last 10 months with consistant results. I clean after about 500 rounds and never shoot with an oily action or barrel. Clean clean clean. Extraction problems are generally caused by oil and powder residue. I oil only if I am not going to use use my firearms for a while.

Just a guess really, its stored on a rack and I just run an 3n1 soaked pull through so unlikely there was oil in the barrel but Im at a loss to explain why it happend in the first two out of a packet.

Put a clean pull thru untill it comes out clean. no 3n1 .Clean the chamber with a good bronze or bristle brush.All you want in your barrel is air. The 22 bullet has a lube groove with lube enough to do the job.

Originally Posted by JRW87

Ive dropped them on rabbits at what I estimate to be 100 metres rested on the deer mesh but I just cant deal with having to clean my rifle twice in one evenings shooting.

geeze mate twice in one night I clean the barrel on my 22 once a year its all it needs honestly the bullets have a wax lube on them which protects your bore so no need to worry about rust

now... I know your getting excessive fouling which is making the need to clean have you tried the ammo in another gun..... same issues if so ammo if not rifle....if its the rifle I would send it away to get checked you could have a rough chamber that needs laping
if you have dry fired the gun a lot? as you might know this is bad for a rim fire it can break the firing pin or put small dents in the barrel face which can cause empty rounds to stick in the chamber also you could try giving the barrel a good scrub with a bronze brush you may have a little leading or something in there

how ever none of this should affect speed so my best bet is ammo best way to tell it go buy some more (make sure it has a different batch number)
and see if that fixes it if not its a fult with that particular batch if not try different ammo maybe winchester Remington or something

hope that helps
rambo

Originally Posted by JRW87

Ive dropped them on rabbits at what I estimate to be 100 metres rested on the deer mesh but I just cant deal with having to clean my rifle twice in one evenings shooting.

Clean a .22?! Surely you're taking the piss!

Yeah I was told not to clean it but when the cases start taking 2 trys to bolt extract with gummy build up on it and then wont extract without flicking them out with a knife. Its had the odd dry firing as I cant count but the action is smoothing and I can feel it load now so should get better. I dont expect too much from a $250 gun, maybe Ill look at something else, maybe a marlin.

jw15? they are normally an ok rifle mate did you buy it new if so id take it back and say its not extracting they should have to fix it under customer grantees act
it should be fit for purpose which means it should work how it should ie cases shouldn't stick

you could get a new extracter you might find your one is a little lose I had that on a cz was not extracting cases with some ammo as yours is not I got a new one and that fixed the issue

Yeah its a JW15, I might ask them about it next time Im in there.

Shoot CCI inside and find a difference in accuracy between the solids and the hollow nose, the solids are not accurate through my Brno, always have a flyer, the hollows are far better? Also put about 5 rounds down the range to sort the barrel,before shooting at the targets.
Never have trouble with sound

Originally Posted by Maca49

Shoot CCI inside and find a difference in accuracy between the solids and the hollow nose, the solids are not accurate through my Brno, always have a flyer, the hollows are far better? Also put about 5 rounds down the range to sort the barrel,before shooting at the targets.
Never have trouble with sound

I've had the complete opposite experience. The solids group better than HP's. They are pretty much the same POI though

That's weird. I've never had the subsonics go supersonic on me. A few other brands, yes, but never CCI.

You might try CCI Quiet .22. That stuff is only 710fps. CCI Subsonic is 1050fps, and CCI Standard is 1070fps.

I have been going over several calculations and cannot find any way in which the 1050fps of the CCI Subsonic would hit the sound barrier due to atmospheric conditions.

As you note, it may be due to your longer barrel. Do you have access to a chronograph? I'm very interested in this.

Regards,

Josh

Just read this , is it possible that its just FRP ( 1st round pop ) in the suppressor rather than a sonic crack ?

I was under the impression that after about 20 inches a longer barrel slows down 22s. Could have got that wrong. Been wrong before.


Just had a look on the net. Some claim as low as 16.5 inches gives maximum velocity. After that the barrel drags on the projectile..