I played around with both in the past through Hesse Arms, not really what I was looking for. Then settled in with the 300 whisper(.308 on .221 freball case). This is what I had in mind and has kept me entertained for several years now. The 6 was really to slow for predation. The 7 was acceptable for deer control with single shot pistol bullets. But the 300 really shines, it can be loaded with 125's for predation and 240's for deer control.