Strength of Brummell Splice?

[Brion Toss]

Hello,
I didn't see the post on TreeBuzz, but it is possible that they were talking about a Multiple Brummel, also known as a McDonald Brummel. This one, properly done, generates in the high 70's % range in HM rope.
The standard Brummels, locked and unlocked, are not meant as stand-alone splices. The latter is unquestionably more fail-safe secure, but a zig-zag unlocked model, of at least three passes, is a whole lot better than nothing, if done properly. That is, it hardly ever starts crawling out and causing things to fail.
Oh, and it would be 72d or thereabouts for a bury in uncovered HM, 48 for covered.
Fair leads,
Brion Toss