Of course, to say Shiloh rifles are "nice rifles" is redundancy to the obvious power.  I have a Montana Roughrider with a standard half round barrel I'm currently shaking down.  It's in .44-77.  Had to see if the bottleneck cartridges are the bogeys some people say they are.

The "standard" barrel actually seems to be pretty uncommon.  Usually it's the Heavy Octagon or the Heavy Half that is offered, and seen on the firing lines.  Maybe the Standard will be a Rare Factory Variation in another eighty years .

How does yours shoot?  Mine has the Sporting Tang and standard blade front but seems to put selected loads around 2 MOA for five shots out to 412 yards or so.  Might do better with an aperture front and vernier rear but I don't want to convert it right now; having too much fun with it.