So basically, a precision swaged bore barrel. Makes sense to me. Played around with swaged bores a little, the last time they were all the rage in the rimfire world. There were some impressive performance numbers as a result, but still was expensive to produce and risky from a liability perspective. Perhaps the timing is right now, for this to take hold(?)...Hi,
The current barrel technology..more specifically the common barrel alloy is the weak link in the shooting world IMO; similar as to tires would be considered the weak link in a dragster build. Luckily they are much much cheaper to replace than the engine .
But luckily the projectile industry has advanced and is advancing at pretty fast pace, especially the bearing surface to length ratios!!
And even though barrel tech/alloy has not changed fast enough, we are lucky to have companies in the industry that not only are willing to modify the lands/groove ratios but also the depth of engraving forces...this is something that when paired with some of the modern monolithics is and can improve barrel life per say.
Along with some of the aftermarket alloy treatments.....barrel life can be extended slightly, but with that being said.....They are the "tires" in our drag cars and are consumable items.
OT Pure Academic Discussion:
I personally see the barrel advancements going to progressive "bore"...not progressive twist but an actually shrinking of the lands/groove dimensions. This paired with a monothic solid built with sacrificial varied OD "sealing bands" could possibly work or the backdrilled projectile design of @Jim Boatright in which the rear of projectile would fan out and seal the larger side of the barrel yet "squeeze" down to the progressive bore as going down the barrel .