The Krag......I just have to sorry.
I have two I will save the photos for the vintage thread, but a couple things about them. First smokeless rifle for the US. Huge dust up on it being a non American design, lots of suits....personally I think this is a HUGE reason behind its early withdraw. There was a "speed loader" for them, worked just fine.
The "smooth" came from just two locking lugs. They are not real strong rifles. If you have one check headspace. After the spanish american war they tried to "up the power" and the rifle could just not take it....you know because 2000fps with a 180 is just not enough for a ground squirrel or something.
Single loading, I would think if I was being shot at would be a bit of a chore, for a range toy no big deal. I have one very nice example as well as a 7mm mauser, there is no doubt the Mauser is the better rifle, but the Krag is not the horrid rifle everyone thinks it is.