450 Express,

The results of the two test were each published in a series of articles. Circa about four or five years ago. BTW, he tried some duplex loads too. IIRC, they were no issue, but no advantage.

I will try to find a couple of copies of the Double Gun Journal that have at least a portion of each series, but hopes are dim because I've moved since then and I'm still looking for and not finding stuff.

I would suggest shooting DGJ an email or calling them. They ought to know and may have the back issues for sale.

There is also an article or perhaps a series of articles focused on Sherman Bell's development and testing of loads for his 450 Express. IIRC, he ended up with hardened cast lead bullets, maybe paper patched. He used his rifle and load to kill a water buff or two in Australia.

Maybe a google search on Sherman Bell too?

JPK