Can Quickload guess at an estimated pressure level for this? [/quote]

I have been doing just that. My QL gives a choice of several brand cases, that have very different capacities.
So much of this post is murky - I'm pretty clear on the 85 gr.
of H-1000, but is 180 gr. E-tip the right bullet?
Anyhow, adjusting the seating depth way WAY out there, and with the highest capacity case, I'm seeing around 60,000 psi.
Switch to the lower capacity, seat the bullet a little deeper,
it goes to 75,000 and beyond rather quickly.
I'd really like to know what brand brass and COAL were involved in this situation, but am not holding my breath...

I will say one thing - from my personal experience with compressed loads, IF these were compressed as high as some of the scenarios QL conjures up, NO WAY were the bullets not creeping out of the case. So probably jammed into the rifling
I'd guess. Which is about all I can do without the details.