Jeremy S. writes: "Bullet Bouquets makes cartridge pens in six different calibers. I figured .338 LM would be big enough to use comfortably, although there’s also a .50 BMG option. After using it for a while I don’t think I’d want to write a lot with anything smaller, but I’m also not sure bigger would be any better. The length and width of the .338 LM do seem to work well…" (via TheTruthAboutGuns)

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