Update.
It was broken down cleaned and lubed. I was going to go ahead and replace the recoil spring, but they haven't arrived in the mail yet.
Practice yesterday. I shot a box of shells thru it first with no issues. My son shot 6 boxes thru it and had maybe 3 failures to chamber.
This week we will clean again and replace the recoil spring when it arrives in the mail.
Any other suggestions would be appreciated.
Thanks
Dave