6mm 7.5 twist SS Heavy Varmint 29"4 groove .237 bore.900 at 28" continued taper
6mm 7.5 twist SS Rem Varmint 29"4 groove .237 bore.830 at 26" continued taper
6mm 7.5 twist SS M24 29"4 groove .237 bore
6mm 7.5 twist SS 1.250" straight 31"
4 groove .237 bore