Gentlemen - I find myself in need of some of your expertise. A friend of mine asked me to "clean up" his .22 bolt action repeater - it's pretty rough. Apparently, so am I - I can't get the bolt out of the receiver. Normally, if I hold the trigger depressed, the bolt slides straight out. Not with this one. What am I doing wrong ? - or, more precisely, what should I be doing, to get the bolt out ? Thank you for your time.