Although I promised myself not to engage in "best gun/cal for Africa" debate-for me it's a no brainer: 375HH/ 300HH- end of story and debate, I am interested in some thoughts about a problem with my 300HH: Custom ammo from a very well established ,well known/respected company-not one round fires- pull trigger- click is all I get-every single round-I'm told "it's a head space issue-" OK- so I went to another company- also well respected, etc- same problem!! I then obtained ammo from Cabelas( Federal) and Midway( Nosler) and no problem except one round from Nosler Before you ask: I checked everything I know to check: Length, seating, overall weight, etc. The custom ammo companies will not divulge primer, powder information because of legal/insurance issues. Possible explanations given to me: military primers were used-whatever that means; lube may have gotten into the cases- but in all and by both companies?!!! Any thoughts from the experts out there?!!