I'm just a beginner cartridge collector. I bought all these "relatively big bore" cartridges (and at least 20 more) all in one box at an auction. There were very few bids on them. I'd like to get more and trade off all the old USA ones that I have, but I don't see how collectors buy/sell/swap these days. If you can't send them in the mail and there are no gun shows, how does that work?

Left to right:

Top row: 1. WRA 38 EX, 2. Kynoch .375 Magnum, 3. WR 500/416, 4. WBY. 460 Magnum, 5. Jeffery 400S, 6. Jeffery 400S (different bullet) 7. Kynoch 400 Nitro (SP), 8. Rigby's 350 Nitro, 9. RWS 9.3x74R, 10. Kynoch 400 Nitro (solid)

Bottom row: 1. Kynoch 404, 2. Kynock .375 H&H, 3. Rigby .416 Nitro (solid), 4. Rigby .416 Nitro (HP), 5. Rigby .416 Nitro (HP), 6. Kynoch .404 Nitro (SP), 7. WW .458 Win. Mag, 8. W.R. .425 (solid), 9. Norma .375 H&H (sp), 10. .338 Lapua Mag., 11. Eley Holland 375 Magnum (sp), 12. Holland .375 Magnum (solid)