How many guns will a 30 gun safe hold?

[Aragorn243]

I picked up a 36 gun Liberty safe at Cabelas on Black Friday. It was my big purchase of the day. Brought it home but left it in my trailer until yesterday when I had my son-in-law and furture son-in-law here for Christmas dinner. I gutted all the small shelves and center support out of it but left the top shelf in place so I have some space to put things on top. So far I have 21 in there with bolts and it looks like I should be able to get somewhere between 50-60 in there before it's all done. Big ones went in first. I filled up the areas where the top shelf allows longer rifles to stick up through so from here on should be smaller more uniform types. Muzzle up, muzzle down is a must.