Triple Se7en is right again...........................that CleanShot is pushing up daisies. And the pellets are worse than the loose powder was for consistency.

For those 300gr SSTs, try 80gr of loose 777 powder or the 3fg American Pioneer, 85gr of Goex, or 100gr of Pyro. The Black Mag powder will probably run between 80 to 90gr for that bullet as well.

If you still plan on sticking to pellets, then 2-50gr Pyro or 777 pellets will be the trick to use with those SSTs.