WD-40 isn't a lube. Buy some good weapon lubricant. If nothing else is available, get some oil from your car's dipstick and use that on the bolt, and keep it slightly wet.
Properly clean the chamber and bore with a good cleaner.
Check for loose/properly staked screws in the carrier key. Check the rings on the bolt
Have you tried using different ammo, and what ammo are you using?
"As an American, I was not so shocked that Obama was given the Nobel Peace Prize without any accomplishments to his name, but that America gave him the White House based on the same credentials"...Newt Gingrich
The problems we face today are there because the people who work for a living are outnumbered by those who vote for a living.
Last edited by Car54; 03-29-2012 at 11:47 AM.