I bet that thing weighs a ton since it's basically got a solid rod of steel for a barrel.
I didn't know anyone was doing sub-.20 cal bullets commercially. I got interested in the itty-bitty stuff about 10 years ago and they only options then were to swage or turn your own on a lathe so I never pursued it.
The maximum use of force is in no way incompatible with the simultaneous use of the intellect. - Carl von Clausewitz
Had a similar tc rifle barrel called the 14-221 Walker. At 4600 FPS with solid copper machined bullets. Almost took it for black bear from a stand but sold it just before the hunt. Didn’t notice barrel wear after forming a bunch of cases but was really hard cleaning barrel with the required custom cleaning rod, tips etc. Guy I bought Barrel from wanted me to try the .12 and .10 calibers he was working with but was getting too specialized already with the .14 cal