SHTF Survival Rifle.

[garand4life]

That's the one Leroy Jethro Gibbs uses?  That's the one for me then.   

Gibbs used a .308 with Molycoated bullets. I believe he even referred to it as a .308 Lapua in the episode specifically. I don't know if that's plausible but it is in the episodes scripting.

[Ichiban]

Gibbs used a .308 with Molycoated bullets. I believe he even referred to it as a .308 Lapua in the episode specifically. I don't know if that's plausible but it is in the episodes scripting.

Some folks just have way too much time on their hands.
http://www.ncisfanwiki.com/thread/4205403/Gibbs+did+not+have+a+.338+Lapua+Magnum#fbid=CNAfUTsIxJy