What ammo would you recommend for this? Rifle: RRA LAR-15 Elite Operator2 w/ 16" barrel 1:9 twist (scoped) Shot range: =< 100 yards Purpose (1): SHTF multi purpose (defense & hunting) w/ priority on defense (have other rifle calibers for hunting) Cost: No object (but still good value) Need brand/bullet weight and source if possible. Purpose (2): practice shooting. Cost: Best value. Need brand/bullet weight and source if possible. Thank you.