Managed to get out to the range today and test the SK-19 with some NSA 17.5 Dome Base HP slugs. A good day for testing as the wind would often die down to under three MPH and sometimes to nothing. As usual the SK shot them in mostly 3/4 to one inch groups at 50 yards just like most everything else I put through the gun. Shot these at 940-980fps. You can see by the large group it did not like that speed.

Tried some of the RWS Super Field 15.9gr also at 830-860fps and it gave me the fits like a few other pellets have shooting one tiny five shot group and the very next five shots some huge outlandish thing. This gun is going to put me over the edge pretty soon. It shoots most ammo in the 3/4 to one inch groups at fifty and seventy-five yards but with certain pellets now and then it will do half inch groups and the very next, with no change to any settings, is an inch and a half. I really don't know what is going on.
Top is a six shot group others are five center is ten shots although the wind came up behind me so it's not as good as it could have been.

Not the greatest but it is what it is with this ammo.

Tried some of the RWS Super Field 15.9gr also at 830-860fps and it gave me the fits like a few other pellets have shooting one tiny five shot group and the very next five shots some huge outlandish thing. This gun is going to put me over the edge pretty soon. It shoots most ammo in the 3/4 to one inch groups at fifty and seventy-five yards but with certain pellets now and then it will do half inch groups and the very next, with no change to any settings, is an inch and a half. I really don't know what is going on.
Top is a six shot group others are five center is ten shots although the wind came up behind me so it's not as good as it could have been.

Not the greatest but it is what it is with this ammo.