This may be correct.
I don't know anything about the construction of Searcy doubles other than what I've read on the net and we all know how inaccurate that can sometimes be.
I seem to recall someone on another forum once claiming that Searcy barrels were tig welded where the barrel shoulder meets the front monobloc face.
If my recollection is correct, Butch himself had to step in to refute the claim and give the true story on that one!