I put together a 10-22 from parts and I am having trouble getting it to feed. It was built to fire the Aguila 60 gr. The barrel has a 1 in 9 twist. After I got it together I tested it out for function by feed rounds through the action. I then took it out to my range. The first ten rounds went fine. I reloaded the mag and started having feeding problems. The first three rounds stuck in the chamber half way in. It was really hard to get them out pulling on the charging handle. I took it back into the house and cleaned it. I checked the chamber to see if it was to tight by dropping a round in the chamber and pulling it back out. That went well, there was no problem. It fell into the chamber and was very easy to pull out. Put it all back together after cleaning and went back to the range. The first three fired then I got four no fires then one round fired that wasn't all the way chambered and blew out the side next to the rim. I went back in the house and cleaned the gun and checked to make sure that the bullet had went out the barrel. I then polished the chamber with qtips on the end of a drill with a little Flitz polish. I ran twenty qtips into the chamber half with the Flitz then one with out. It seemed to polish up nice. Back to the range. Nothing had changed the first three didn't feed more than half way into the chamber. Then they started going in deeper. Maybe sticking out by only a 1/4". The last round chambered all the way and fired. I filled the mag again and more of the same. I quit for the day. The next day I took the new barrel off and put the old barrel on and it failed to feed CCI stingers. They would get stuck half way in the chamber. I changed back to the new barrel then tried to feed the 60gr through it. No luck they would go part way in the chamber part of the time out of 10 rounds only one chambered completely. I am at a loss as to what could be wrong. I thought goop or wax was causing the problem but that isn't so because you can drop the rounds in the barrel with out cleaning it with no problems. I have ordered a Kidd charging handle with the three springs. May be the old spring isn't giving enough power to put the case in all the way. I do know that I put in a new plastic buffer and it has been beat up really bad. So I ordered the Kid version of the buffer too. I am at a loss as to what is wrong. Any one have any ideas? The mags are new and just to be safe I took one apart to clean it and shouldn't have bothered. It was fine as I thought it would be. Thank you much for your time.