rice grain shooting

The LG110 loads different than the Hunting 5. The Hunting 5 has a Magazine, the LG110 has a lever on the right sight. This opens the barrel like the Weihrauch HW97 for example. Then you put the Pellet in and close it. 

I don´t know WHY the Steyrs are so accurate. But if you look at the results of the german field target championship: 
http://www.bds-field-target.de/dm2016.htm

there are many Steyr on the top of the resultlist. Only Anschütz (which is much more expensive) and a few Feinwerkbau are there to find. 
Steyr only builds weapons for the challenge. So they totally concentrate on that. 
For that, you have to pay a high price. But you really get something for your money :)

Have a great day!