Ok, so I really got my 12fv for bench use and feeding rounds into that single stack centerfeed mag with a scope on, etc. is just a PITA.

So I ordered a SSS single shot tray from kinneysshootingsupply.com (they rock on service and shipping!)

Managed to get old centerfeed mag out and the tray fits in but any kind of jiggling of the rifle - like say, when it is in the case in my car and I go over my bumpy drive way on the way to the range - will cause it to fall out of position.

I've read here in the forums that a little dab of epoxy will hold it in place. But what type of epoxy and where exactly should this little dab go?