Had one for many years. Back then we were shooting around 200 rabbits a week every week . I had mine shortened by Calum Ferguson a back when he was just starting out in Langhom as they do have a long barrel . mine be used to love Eley scorpion hp ammo so I used to buy it 2000 at a time .
Mine was actually very accurate but you did have to keep it clean in the chamber area as wax build up could cause hangups.
The trick to stripping the 525 is to have the spring support guide or you may as well try pushing wet spaghetti up the stairs

the tool is easy to make though if you need one ?let me know .
I had a spare 10 shot mag that cost about £50

30 years ago when I was on about £100 a week !! They did work flawlessly .
Finally they were made in Italy by I think franchi ?