I think
@bowji john is doing just that.
I'm embarrassed to say that I've not yet done the testing
I plan a series of penetration tests to compare flat meplat solids (peregrine VRG1), round meplat 'softs' (peregrine VRG3) and hydros - for straight line penetration
I only have hydros in 2 calibres - 9.3 and 404 Jeff
Their purpose was / is
1. As a back-up round in a PG scenario when hunting with the relatively light weight 9.3 and suddenly running into something 'large with attitude'
2. A compromise round (between solid and soft) in the 404 jeff mag (only 3 rounds ) when deciding on the make up of what to carry when in the bush (there is endless speculation as to whether to carry solid, solid, soft or soft soft solid or ..... you get the picture)
(The hydros are advertised as a high penetration round that work as a solid but with the wound channel of a soft)
I've never intended them as a stalking round in the UK - I use Nosler Partition and 143 ELDx for that
The project got postponed as my 404 Jeff is still with the gunsmith - returned to him as it had feeding issues
I did find that there is an absence of good reloading data for the hydro - The issue being the sheer length of them and the seating depth required with the potential for compressed load issues
It didn't help that my gunsmith told me not to put those rounds through my rifle if I valued the rifle (no - I've yet to get to the bottom of that one)
Both my rifles - being medium bore have very long throats in the chamber
I wonder - with some smaller calibre UK rifles - whether the length of these copper bullets might cause jamming into the lands or difficulties in chambering ??
I will work up some 9.3 loads over the next couple of weeks and report back
As an afterthought - with these larger DG bullets - I think they are brass not copper