Would Bannerman have added the tang, stamped their name, and then drilled a hole through it? Doesn't make sense.
The ledge just in front of the added tang would act as sort of a recoil lug, but the wood it engages isn't backed up very well.
Another way to create a recoil lug is to leave part of the butt socket in place, running down from the receiver, when the rest of the butt socket is cut away.
A better solution would be to install a Savage/Remington style recoil lug sandwiched between the barrel and receiver ring.
The ledge just in front of the added tang would act as sort of a recoil lug, but the wood it engages isn't backed up very well.
Another way to create a recoil lug is to leave part of the butt socket in place, running down from the receiver, when the rest of the butt socket is cut away.
A better solution would be to install a Savage/Remington style recoil lug sandwiched between the barrel and receiver ring.