What they all said. #11 is just fine. I have 2 Firehawks and they are about the same cept for the cocking. The Firehawks shoot "belted" type bullets just fine, any from the 223 to 405 grain. Sabots in the 300 grain range shot good too but have to swab between shots to load. I shot the 250 SST sabot hunting and it shot great, carried a 245 belted for reload in field. 85 gr of pyro P shot lights out accurate. Nice pick up and nice looking gun. 10