Phatinjun, why the stub? A couple of reasons; one, the original plan was for a switch barrel and I didn't want to make more than one of those lugs. For me, it's a lot of work. I'm pretty experienced at threading and chambering barrels. So I could have several barrels, maybe a 44 Mag. and a 30-30 in addition to my 300 AAC while not having to make more than one lug. Two, I want to heat treat the welded piece for proper hardness and stress relief and I don't have the capacity to HT an entire barrel (my oven isn't big enough). I know lugs have been welded on barrels and then slowly cooled without any oven but...I would rather stick with processes I'm familiar with than maybe learn the hard way! But the biggest reason, just 'cause I wanted a fun, challenging project more than anything else.
Spooked, my photo-chop does look funny but it should be "to scale", even though the proportions do look off.