By design O/U are stronger period ! And, I didn't suggest to anyone to use one ?
Personally, I think they look like....

I do use RL 15 in my double and it works great ! so I would recomend that powder to others.

And on one point I do stand corrected however, My chambering is simply the nitro express rather then the BPE "magnum"
Thanks for clearing that up.
btw. You still haven't conceded that you were in error on that former statement regarding the "Fast powder in a large case" on LIST but rather chose to subdue that with some fluid .. ! hmmm.
It's OK I understand, because I work with hordes of engineers and when layman like me challenge them, they seem to crumble !!
He He I eat them for breakfast !! mmm love'in It !! lol

Be sure top pick up a set of ACKLEY'S books, you'll have time to do some research while your on the plane.

Tom