Got in a little trigger time today. Rifle: 338 Kubla Khan, built by Kirby at APS. Nesika action, 30"Lilja, PK brake, A5 stock, NF NXS 5.5-22X56. Rifle has about 100 rounds down the new barrel just intalled by Kirby. I set out to test changes (if any) from changing the seating depth of the 300 grain Bergers. I loaded 3 sets of 3 rounds using 105 grains of Retumbo, Fed 215M. I have shot the Bergers in my other Khan, but this is first Bergers I have shot from this rifle. Load was based on development done on a different rifle at lower velocity of 2875fps using 102 grains of Retumbo. The average speed as checked on an Oehler model 35 with 3 sky screens = 3024fps. The test range was 300 yards with a 5 to 8 mph variable wind from left to right. Group 1: 3022fps / 3017fps / 3024fps Bullets seated .009 off the lands. Group size in in MOA = a little under 1/2 moa Group 2: 3024fps / 3022fps / 3018fps Bullets seated .006 off the lands Group size in MOA = Just over 1/4 moa Group 3: 3032fps / 3027fps / 3032fps Bullets seated .003 off the lands Group size in MOA = 3/4 moa Shot #3 on group 3 could have been me, the shot did not "feel" good, but I did not have another round loaded to try again. Other than shot 3 group 3 the groups were shrinking in size as the seating depth got closer to the lands. Velocity took a noticable jump on group 3 which would indicate pressures are going up as the bullet has less room to "jump". Conclusion........ More testing needed, guess I'll just have to shoot some more. Maybe conclusions: IF, big IF..... shot 3 group 3 was me, the Bergers look like they will handle 3000+fps with this rifle and load. Now that I know this rifle likes the Bergers seated close to the lands, I will do the same type test with powder charges and probably try some other powders... H1000, 50BMG, and RL25 are the usual suspects. With the powder fine tuned I think it is very possible to get her to shooting 1/4 moa with the bergers. Comments, and suggestions welcome. Just thought the 338 guys out there would like to know the result of a test of the 300 grain Bergers at over 3000fps.