Ok so i just found out through my job that i get pretty good discounts on all Remington firearms. So......Thats means a new rifle ;] My two current options are the SPS tactical .308 or the SPS AAC-SD. As you know both guns are almost identical except the AAC-SD has a threaded barrel and has a 1/10 twist as opposed to the 1/12 twist. The price different to me is like $20-$30. I plan on shooting pretty much up to 500yds. And i would like to stick with my 168gr bthp. But as we know a faster twist rate likes heavier bullets. Which one should i go with?