Yup, most everyone, not me, mine is a 1:12", has reported the 1:9" .223 H&R/NEFs shoot the lighter bullets great, but they don't shoot the heavier bullets that you would expect them to do well with, if the search worked, I'd point you to numerous posts on the subject. Try the 40gr-50gr loads!

One of the threads on the Win whitebox 45grJHP compared how they shot in the 1:12" to 1:9" barrels, they did great in both!! Unfortunately, like all ammo, recently went up to $16 a box of 40.

Tim