Almost forgot, Sjsfire brought up the tighter bore idea. I have always slugged my bores to see what they were and i forgot to do that on this one.

The accuras rifling is weird. The land itself has a very narrow/shallow goove in it. It was very hard to take measurements on this rifling but i came up with measurements from .501 - .502 land and .507 - .508 groove. I used a tight fitting remington gamemaster conical to do the measurements but will get some hornady great plains conicals and redo the measurements.