An NAA mini revolver is a "mouser". ROFL! Wow, though, 40 bucks doesn't seem like much of a bargain for once fired. But, then, it is sort of an odd caliber. I like the .308 for brass, surplus military is dirt cheap. I think I gave about 10 to 15 bucks a hundred at Midway last time I ordered some.
There are OH so many reasons to reload for rifles. First and foremost is that I can load much, much better ammo than I can buy. This is especially true of odd calibers. There is just not much variety in factory ammo for 6.5x55 even when you find it. I have a similar situation with the .257 Roberts, but I have reloaded for that gun for 40 years now and inherited all my grandpa's reloading equipment when I inherited the gun. I've fired some Winchester +P .257 through it, 100 grain silver tip. It chronographed not quite 2900 fps and shot about 1 moa. Now, that's good enough for gov'ment work when deer hunting, killed a few deer with it. But, my handload shoots 3/4 moa and pushes a Sierra 100 grain game king to 3150 fps and it kills lightening quick, a significant improvement over any factory available load in the caliber. I can buy factory loads, Federal Premium 160 Nosler Partition, for my 7 mag, but it's nearly 30 dollars a box! I can load similar ammo for a LOT less. Any gun, even in common calibers like .308, can be improved in accuracy by tailoring a load for the gun. I've never fired a factory load in my .308.
So, if you ain't handloadin', you ain't a serious shooter IMHO.