us"" xs's"" gota stik together,,,,I know what the books say ,,,but,I have shot a bunch of 14 twist BR's over the years,,,and have got "some" 80's to work,,,in mine the Bergers will and the Fowlers will not,,,neither will the Sierras!!!...It is all about BC and bulelt length and desighn ,,,not that one is a better bullet over the other,,,.with 14 twist you are on the "edge" at 74-75gr ,,,you just gota try em,,,I will never get another 14,,,13.5 or 13 for my bench guns from now on,,,esp with the popularity of the 66-68 gr BT's...Roger