Ok I'm getting old and have been out of the field for some time, but what's the point? I get a hardened barrel and the advantage of decreasing the interval between barrel swap outs but how important is a barrel that will withstand a continuous burst of 800 to 1000 rds? As someone that used to hump the pig, I would have preferred they spent the time, money and effort on making it lighter. I see this change useful for a defensive fire plan and that's about it. Even then a good crew should be able to swap out a barrel in less than 15 seconds. Assuming your fire plan is a coordinated effort with overlapping fields of fire this will not significantly decrease the amount of rounds heading down range at any one time. We used to teach gunners to fire 6 to 9 rd burst to prevent barrel over heat and allow them to correct their aiming point. Two guns working in concert can put a continuous stream of lead on target without worrying about barrel overheat.
What am I not seeing? Perhaps one of you hard chargers can help to re-educate this relic from a previous war !