So hey I'm new here and I have qa question. I have a Ruger m77 MK II 25-06 bolt action. It's about 10 years old. I have recently had an increasingly hard time clambering a round. Pushing the bolt forward is no problem but pushing the bolt down is getting very difficult. I clean it every time I fire it. The big problem is the last time I went to the range it discharged when I forced the bolt down on the third cartridge. This worries me. Has anyone had a problem like this or know what could cause this? Or should I just take it to an armorer?