The 5 shot .36 caliber is not a non-traditional revolver tho, Remington made them in the New Model Police (they were largely converted to rimfire after tho), Colt made the 1862 Navy/Police, and I believe the Adams DA/SA was a 5 shot .45 caliber revolver. Would people be interested in a 5 shot 1858 .44 caliber? I think they would if like the 1862 Colt vs the 1851/1861 Colt the smaller 1862 weighed a pound less and felt better in the hand. I was just handling my 5" Pietta 1858 Sheriff last night and between it and the 8" Pietta I also have, the shorter barrel made it feel very different, much faster to bring up to aim and shoot. If that Sheriff model weighed half a pound less and had a similar barrel length, it would be THE cap and ball revolver to have. I think the reason why it hasn't been done is indeed tooling, but also their being way too much focus on full size revovlers that were used in the Civil War. 1851, 1860, 1858... those were the guns mostly used. The only reason I think Uberti makes the 1849 .31 is it was very popular back in the day with civilians and the 1862 mainly uses the same parts as the 49, so Uberti said, "Why not?" A medium sized Remington New Police style, while it's bigger than the 1863, it's a lot more shootable. For people who buy an 1863 (which from what I hear they're not that great, loading levers snapping, oversize bores, etc.) I'm sure if given the option they'd rather have a New Model Police Remington repro with 5 shots of .36 or .44 instead of .31. I look at that 1863 and I say to myself: Whoever the people who are buying them, it can't be that many compared to the larger Remington repros. So, if the market is that small for the 1863's, the Dance & Brothers, that completely non-traditional .36 pepperbox, and Pietta still makes those, then I don't see how they wouldn't be able to sell a ton of the NMP repros at $300.