I have been using the 777 primer with 3- 50gr 777 pellets and the Winchester 209 primer with the regular Pyrodex RS ffg. I really want to keep on shooting 150 grs of 777 pellets or an equivalent loose powder charge so my Omega scope ranges out for the intended yardages of the scope. I really hate to have $1100 in this set-up and have to keep on running to the gun shop and buying different sabots, bullets and powders every week. I just wish I could finally get lucky and find a powder/sabot combo that would load and still shoot accurately.