I am shooting a .308 air gun with a 28" barrel and a 1/14" twist rate.I have tried every .30 cal cast and swaged bullet I could get my hands on (over 3000 rds fired). GT's 100 gr and 130 gr are at the top of the list for the best bullets I have fired.I am getting 1/2" groups at 50 yds at apx 840 fps. I can order these bullets without lube and get the 130 gr gas check WITHOUT the gas check (125 gr) or lube. The people at GT are easy to work with and very reliable which is why I will continue to order from them. Their prices are very reasonable too. If you have a Texan in .308 you should give these guys a try.