My UpLula has completely spoiled me. I didn't think AR-15 mags for the PLR-16 and SU-16 were difficult to load, but the MagLula loader for the AR-15 mags has completely spoiled me there, too.
I was hoping there was a MagLula magazine loader for the Black Dog Machining .22LR magazines, but there isn't... yet.
However, there is a $120 mag loader from Black Dog Machining. I haven't used it but it looks and sounds very nice. The .22 LR rounds are dumped loose into a bin and they're automatically oriented and loaded into the magazine. The price is so high because these are machined products. It looks like the demand is so high that when Black Dog Machining made a prototype to test, customers wanted to buy the expensive prototype, and BDM gave in to customer demand. They're working on a more manufacturable magazine loader that is made from less expensive injection molded parts. The market will be large (essentially anyone who must push those little .22 rounds into the BDM magazine), but it's not a huge market, so the cost of the injection molding tooling won't be spread over millions of units. Even then, I expect the magazine loader to be in the $40 to $50 range, and I'd buy one at that rate.
Almost all of this was discussed in a recent SU-22 thread, starting at the bottom of my initial SU-22 range report.
http://www.ktog.org/cgi-bin/yabb2/YaBB.pl?num=1218851532/15#17
"Is there a mag loader?" is an obvious question to ask as soon as a PLR-22 or SU-22 is taken to the range. The topic definitely deserves its own thread.