I have a 25cal Impact M3, 700mm barrel with superior heavy liner. I have been shooting JSB 33.9 grain MK11. They shoo1/2 " groups @ 50 yds aqnd 3/4 in groups @ 100 yds on a very calm day. The heavy liner shoots these pellets better than the standard superior liner. After 5 tins of (300 count) I am out pellets. I can't find them at any of the major dealers. UA has the FX 33.9 pellets in stock. Are these the same quality or better than the JSB counter part. I am aware that JSB makes their pellets, but i have heard some complain that the quality is not as good as JSB brand. Can anyone shed some light on this for me as I wanted to buy 10, 300 count tins.