Nielsen .22 19 grain slug experience in Air Arms S510?

I would be interested in knowing your experience, if you own an Air Arms S510, and have tried the Nielsen 19 grain slug. Mine groups the 21 grains pretty well, but to know advantage over a conventional AA 18.3 Gr or JSB 18.13 pellet.... Before I purchase the 19 grain slug to try, I thought some of you might save me some money.....

BTW - my .25 AA S510 didn't like the 36 grain Nielsen slugs at all. The groups looked more like a shotgun pattern.



Thanks.
 
Given my experience with them in my S500(.177) if the heavier rounds work well the lighter ones Should be a bit better/more accurate. Also the advantage isn't in stopping power, but bucking the wind. You should see about 3x the BC compared to a pellet with close to if not the same weight. That means much less wind drift, and a flatter/longer trajectory before and after the rounds apex. And yes, more power down range increasing your effective killing distance.

John