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.