If it were me I would look seriously at the 6mm AI the slight velocity increase should make it work with 105 grain bullets and I like the long neck. Besides the cool factor is way up there.
It's funny how some barrels with the same listed twist rate will not handle some bullets but others will. I suspect three things: slightly out of speck or slower twist, a smoother more concentric barrel imparts less wobble so the twist has less work to do, and in the case of the longer bullets testing at 200-300 yards might show they have settled down versus 100 yd. tests.
Hope I didn't just perpetuate additional ballistic mythology.
"When you disarm the people, you commence to offend them and show that you distrust them either through cowardice or lack of confidence, and both of these opinions generate hatred." Niccolo Machiavelli
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