Maybe a barrel obstruction, cleaning patch, cleaning rod etc?
Yeah. That's it. I always stop right in the middle of a string, to clean and leave patches and rods in the bore. Jeezuss, Do you really think I just fell off the turnip cart today? But go ahead, tell yourself whatever you want, so you can 'contribute'. Or just google it. Seems that is your standard answer to things you know 'all' about.
An investment cast Ruger.......no wonder Hornaday distanced themselves from this mess. The reason this thing blew can be found out, have you expended any effort to find out? what were the conclusions?
