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200 20X in the .308 question

It can be fed from a magazine. LR308 would sacrifice alot of velocity. If it were fed from an AICS/AW it would not sacrifice so much. The bullet is long and you're looking at 22-2400 ft/s at the muzzle safely.
 
It would be moving awfully slow; probably too slow to get the benefit of the higher BC. In a 30" barrel with .170 free-bore loaded well longer than any AICS magazine, it goes 2640 FPS.
 

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