I have one of those, and really like it. At first I got a lot of misfires, so I chucked up the breechplug in the lathe and polished the nipple so caps would fit properly. Then dissasembled the striker and replaced the factory wimpy spring with one from a Rem 700, cut to the proper length. Misfires went away. Still need to do a trigger job on it, there is a lot of creep in the factory trigger.
My barrel sights were useless, 2 feet low at 50M. I got a Williams peep sight for it, and now it is good from 50 to 300M.
I am shooting 500gr. paper patched bullets in it, cast from a NEI mold and patched with 9# onionskin over 100gr. Diamondback FFg. Accuracy is terrific, one big hole at 100M and hits our gongs in the same place at 200. I haven;t tried it on paper at 200, but it just leaves one shiny spot through the spotting scope on a freshly painted gong.
I agree, don't know why they quit making them. They work well!