JSB makes top tier ammo. Consistent quality seen throughout their line of pellets. They have tackled many of the popular calibers with ease. These JSB Diabolo Exact .30 Cal 44.75 gr pellets are a great weight for most .30 caliber rifles. If you need or want something a bit heavier to buck the wind and carry a slightly bigger punch, the heavier JSB 50 gr pellets.
It's all a balance between power, weight and twist rate. If you get those right you will see the results!