Thanks for the pictures, I'm glad your boys have a good role model to follow. With the stories and adventures you have they probably have some cool dreams and hunting goals.
I just purchased a .375 Ruger, because I believe it is a cartridge of the future. Bought a Heym SR-30 chambered for that. It was not cheap, but a gun with life time guarentee on everything but the barrel doens't come cheap. Since I live in Germany, and have a friend that works for the factory, it maks things easier. Second reason is that I have a SR-30 in .308 Win, and I can practice technique with cheap ammo and low recoil; same action and bolt pull length (because .375 Ruger fits in a standard length action/chamber), and close to the same weight.
I have a Hornady import/export rep. contact that can help with getting ammo where needed. Let me know where (city/country), and I will ask him about how to get it there. I need Hornady .375 GMX, because I hunt in a lead-free zone, and he is getting it for me. Takes about 6 weeks. The German importer told me that Hornady didn't make .375 Ruger with GMX, and the Hornady rep got with him and is sending him a case in the next container headed to Germany.