I test fired a 338 Nawakwa (338 Lapua imp) yesterday I just got done building
Parts list I used
Broughton 9.3 Twist 1.350 straight taper to .850 fluted SS barrel
Lawton action
Jewell bottom safety trigger
Mckree stock
Night force scope 8x32
Nawakwa Accuracy brake
300g SMK


here are the resalts 5 shots at 100 yards


and a video of me shooing the rifle
YouTube - 338 Nawakwa 300g SMK 2900 fps