Flood it with WD 40, tap it on solid wood / ground easily ..squarely..
and if need be get a cleaning rod put blunt patch tip on it wiggle it till free..
how did you do something l8ke that?
I only had six rounds in the tube..Load one less bullet than called for...is a practice I’ve done with tub feed guns over years..
over all lengths of 22 bullets ...change over the years, with bullet weight, bullet shape..!
also clean scrub relieving tub as you clean any barrel...
One of my 46M's did this once. I ended up using a cleaning rod to push the spring up further in the tube and a piece of dirt came out. It has worked flawlessly since then.
A word of caution - if you take the retaining pin of the locking end DO NOT pull the spring out from that end. Don't ask! I have done a few of these and found the best is to slowly push the spring out from the receiver end. You can clean the tube with a 22 cal bore brush and then a patch. Some springs are already broken so be careful. The mag tube can be cleaned with a bigger bore brush. Very lightly oil and put back together. The retaining pin needs to be flush on one side and the other side sticks out to catch the lock slot. Most of my model 46s have had this attention.
I use a small needle nose pliers and the pins just pull out. Use the needle nose to push them back in. Some other makes as noted are not so easy.Some mess up the tubes ....taking pins out putting back in...roughly?