My708 bbl is a Lilja 27 inch 1/9 tw #3 conture , tested muzzle velocity tmv 120 s 3146 varget,140s Sierra & Nosler 140 bal-tips 2840-2925 tested no 140 vld s, 150 sierras bts & match kings 2800-2835 ,160 Sierra bts 160 Nosler accbds160 tipped match kings 2780 ,2780,2717 in 50 degrees temp.168 vld tmv 2735- 2781. Have not loaded any 175 or 180s .all reloads tested over a Oehler 35p chronograph . Best powder is H4350 , varget used with 120s, 140s ....sleeper powder is H414 with 168 Sierra match king tmv 2750 = 5/8 3 shot group a100yds best 300yd 3 shots 160 tipped Sierra match kings 1 inch and 1/16 ctoc , best 625yd 3 shot group was 3&1/8 inch ctoc , I'm favoring the 150 s & 160 s they just fly great ,yeah I'm loving my 708 , thks jjmp