No 'real experience' here. But I'm intriqued now.
Those 130 grain Speer .30-30 bullets are what I'd gravitate to, first. I have loaded those for my dad, but neither he or I killed anything with them.
The mention about the 125-BT's indicates those bullets (BT's have always questionable in my experience , for their "explosiveness") are still too 'soft' for deer at higher velocities,
but maybe not [lower] handgun velocities? Is there enough data about the
Core-Lokt's and Hornady cup-n-core's to predict what they would do at 2200fps? 2300fps? 2400fps? 2500fps?
Exactly where does the 'threshhold' exist for those bullets at WHAT velocity? 'Threshhold' is what I'm calling
that line where a bullet performs in the classic expansion and mushrooms (even explosively with some bullet designs) going through a deer, or failing to expand adequately if at all?
If I was trying to figure out what you're asking 44Man, I frequently make an Excell spreadsheet, and then peruse MidwayUSA's sight, doing a search for .308 bullets.
If you did such a search, you could narrow possibilities by looking
at bullets less than 150 grains, and then by brand.
On my spreadsheet I would record ballisitc coef, sectional density, as well as grain-weight, profile-type as well as description. I make and use my spreadsheets to help me visualize and compare what I'm looking at. (I'm often comparing cartridges that way, sometimes bullets, molds, even wildcat rounds
when I'm checking out my latest question about silly idea I'm running down).