Thus far I've tried the 26.8g & the 29g NSA slugs at 940fps...wasnt happy with a 1 & half inch group at 50 yards...I've ordered some VK 33.5g, Griffin 30 grain, 36.2g NSA as well as some 26 grain Wicked Monster Hollowpoint Hybrid Pellet by Ratsniperslugs...all should be here later this week...If there is anybody out there that's gettin good Results please let me know witch slug & fps your shooting at...I'm talking at the The minimum a dime size group at 50 yards...