I fully agree with Twinsen. I would spend the extra $100 and get an 11. Why spend money and time on a spring to make a non-accutrigger better when you can get a fair-good trigger off the bat. The ability of a .223/5.56 to effectively engage targets at 300 yards is a given if your skills are up to the challenge. A quality scope, a good trigger and ammo your rifle likes will go a long way to helping you improve those skills. If it were me, I'd get the .223 and when the next bang-bang jones hits I'd get a .308. Good luck on your rifle shooting journey. May it give you a lifetime of enjoyment.