This wouldn't be so bad to do, a very thorough account could be done with a single rifle in a couple of hours easy, you're not shooting for groups and testing many variables at once like with the HV stuff. POI with each style would be nice to know, but you can determine that with a 2-3" pattern.
Getting into slump (hydraulic ballooning, actually) testing could be as involved, or not, as you like. We know where various alloys start to flow, what powder in what cartridge behind what bullet weight with how much jump wills start to cause it, so even the dynamic BC tests wouldn't necessarily be all that complex or time-consuming. You could tell right off if your load and alloy were doing what you intended, and if they didn't, stop the test and try different loads. The buggar, as always, is no being able to recover pristine bullets to see what shape they have become after firing.
Dan, the half jacket will interfere with the hydraulic flow of alloy to a certain extent. If you really want to see some BC weirdness, take a .30-caliber slug cast of air cooled wheelweights, no tin, wet-patch it, and load it to jacketed velocities with jacketed load data and a middleweight powder for the j-bullet class. Good example is .308 Winchester, 155-grain bullet, and 4064. The whole bullet becomes a torpedo shape, regardless of how it started out, and will drop a lot more than tables say it should. The paper will enable the soft alloy to withstand the launch stresses, but won't be able to keep alloy from flowing some distance toward the ultimate outcome of a hemi-spherical nose.
