Fallout IX: Nuclear Cash Cows Go MMOoooooo!

[ShneekeyTheLost]

There are two more fun ones if you're a pistol lover like I am: Maria and Lil Devil (12.7mm GRA) both have an x2 crit modifier. Lil Devil is harder to feed than Maria, but easier than Light Shining. While 9mm is probably the most common ammo in the game.

If you do want 12.7mm, make friends with the Khans.

.45 Auto is surprisingly easy to obtain after you complete the DLC, as ammo starts showing up all over the Mojave, but especially the Khans, Mick & Ralphs, NOVAC, and the GRA Vendortron.

Maria is... well, it's kind of late into the game, as by the time you get access to it, you're having to make your Big Decision. Li'l Devil I had forgotten about, but yes, also viable. In my experience, ALSD is easier to keep fed than Li'l Devil, because its ammo starts showing up at pretty much any vendor that stocks ammo once you complete the DLC, but YMMV.