Where did you find that???
Its not my safe lol - I'm making some enquires on one thats not quite as wide as that, but is deeper - fireproof etc
Was thinking a couple of hammocks and some food and turning it into a SHTF shelter haha
A few people in the states have made 300 yrd ditches and covered it with shadecloth, to eliminate the winds effects on their target shooting, it worked for them.
I cant find the website it was on, linked off snipershide I think.
An indoors 500yrd range would be great, like a mainfreight building/warehouse.
Bookmarks