The #1 is, IMHO, the classiest and most beautiful regular production rifle available today for reasonable money. I've had a ton, have only one now and would never be without at least one. Mine is a 26-inch-barrel Sporter model, with the mandatory Alex Henry fore-end and iron sights. The bigger bores like .375H&H, .416Rigby, .458WM or Lott all beat me like a rented mule in this platform. The #1 ergonomics are not perfect for me.
On the other hand, the #1 is a fairly heavy gun and IMHO doesn't really suit a small cartridge either. A #1 in my preferred Sporter configuration is just too portly to be an appropriate platform for a .22-cal or .243-cal cartridge. I suppose if it were the Varmint heavy-barrel model it would be okay, but then you've lost much of that lovely Farquharson-inspired aesthetic. I also, for similarly irrational reasons, don't love the idea of a short-action cartridge in a single-shot.
So, for me, the ideal cartridge for a #1 is something in the .30-cal range; the .300WM is just about perfect, a great combination of power, ranging ability and comfy recoil.
Trigger work? Fore-arm bedding? Yeah, a few of mine have needed that to perform at their best...just like a few of my bolt rifles.
One particular benefit of the #1 which I rarely see mentioned is its flawless ability to handle rimless cartridges. I have many other singleshot rifles and I can't think of any that have never gotten into the pickle of having the extractor slip out of the groove of a fired cartridge, leaving the empty brass in the chamber in front of the extractor. It's not common, quite rare actually, but it happens. But after owning and shooting probably a couple dozen #1's and loading some of them pretty hot, I've never had this occur with any of them.
When you're talking about getting a #1 or any other singleshot, you will eventually meet the guy who points out that for the same money, you could have gotten one or a couple of plastic-stocked Ruger Americans or Savages or whatever. That way you'd have a repeater for "quick follow-up shots" and wouldn't need to worry about weather issues. Just ignore those folks. The only heirloom they will pass on to their kids is a lack of soul...
