The 360n EX is the designation for the 360 Express. There is a 360 BPE and a 360 Nitro express which are basically the same case. Check the rim thickness. The 360 BPE has a thinner rim. I believe the 360 NE 2 1/4" has a thicker (0.060") rim.

I think the 360 NE is also called the 9.3x57/360R and is based upon the 9.3x72R (E).

Both cartridges are excellent deer cartridge.

The 360 BPE ises either a 155 gr or a 190 gr bullet (rthough there are some loads with 300 gr bullets.

Brass can be bought from Buffalo Arms. My reloading dies came from CH4D.

Your buddy's rifle is very nice.