I have a 26" Krieger barrel 30 cal 1:10 twist. Want to build something on it. At present I am looking at the 30/338 Lapua AI, 300 RUM, or the 308 Bear. With a 26" tube, not sure of pros or cons with these choices, or their performance. With the 1:10 twist, probably look to shoot 210 BERGER or something in that weight class. This will be a long range carry rig, weight in the 10-12# range. Feedback on choice would be appreciated.