I am in the process of rebarreling my 338 Lapua, 98B Barrett.
It seems to be fairly straight forward.
I can't get a NZ made barrel as they are .5mm to small in diameter.
So I'm getting an Aussie one
I'm getting two made, a 1-10 & 1-7.5 so that should be interesting.
I'm keeping the length & profile the same as original, so it fits in the case
I would like to get another barrel extension, but I'm having trouble getting a response from Barrett