This is what I posted over at the Canadian Airgun forum.
http://www.airgunforum.ca/forum/viewtopic.php?t=22227&highlight=
There are pictures by someone else of my gun that you can click on.
The ammo that I have is marked as Made in Canada.
I first learned of the system many years ago when I came across a box of 100 at some gunstore in the USA. I bought the box for my cartridge collection, never planning on actually firing it.
Much later, I noticed an ad from Gun Parts Corp in the USA for ammo for $17 per 1000 pack.
Soon after, I saw an ad in Can. Access to Firearms for a gun for $75. It was cheap because the sear was broken and the seller had no ammo. I quickly phoned GPC to see if they still had the ammo, they did, so I bought a bunch then did the deal for the gun.
I was able to make a new sear by copying the two half parts the seller sent.
It is not really accurate, and as the ammo is about 40 years old now, I do get the occasional misfire.
Using the gun strictly as an air-rifle is a bit pointless, as it has a retardedly low velocity. I doubt it could shoot through a piece of toast. But with the VL ammo, it goes about 1100 fps. The rated speed is supposed to be 1150, so it is not to far off the quoted number.
I tend to like the goofy, unusual types of technology, so I also have a HW35 Barakuda with the either injection thing. I'm trying to restore that one as some of the tiny screws are missing.