@QCB
The 140 Hybrid is the best bullet I've ever shot out of my 6.5CM. As far as seating depth, everyone parrots that it's not depth sensitive, and it does give you some cushion, however depth definitely matters (see below).
I shoot it with H4350 primarily, but I've also shot it with RL16. RL16 gave me great groups at short range, but at 1k acted a little funny on me the last time I shot it in match; it's also a double based powder and seemed to erode the throat more than H4350 did.
I've seen a lot of guys shoot it at mid-range matches and it's done exceedingly well. At LR the 6.5CM in general gets stomped by the 7mms and 30 cals.
I think guys that report 'problems' getting the hybrids to shoot are generally trying to push them too fast. Mid-high 2800s is what I find best in mine.
I dont' shoot my 6.5CM near as much as I used to. I was playing around with it while I had a couple of Pandas built up for 'serious' FTR work. Those are done now, so my 6.5 has gone unshot for the past couple of months.
Here's a snippet of my load data; not sure if it's of much help:
As far as seating depth sensitivity, here's 3 different 300 yard groups. The only difference was seating the the bullet .005" deeper in the case between the three groups. These were all 'one holing' at 100 yards, at 300 you can see the differences in much greater resolution.
For reference, my barrel is a 30" Bartlein 1:8 twist with a SAAMI 6.5 reamer, on a Kelbly Atlas Tactical action. My charge weights will probably be lighter than yours given the Alpha brass. I also think you're probably pushing those ELDMs pretty freaking hard for as short a barrel as you're running. Do a standard OCW followed by a depth test, from .005" off, working back in .005" increments. You'll probably find a sweet spot by the time you hit .030" off.
Edit: Yes, the G7 BC holds up exactly. I get the most accurate data using Hornady's 4D0F program; I think they even have a ballistic profile for the 140 Hybrid by default. I was shooting FTR a few matches ago, but pulled my 6.5CM out to test E-Targets at 1,000. The Hornady data had me shoot 3 Xs cold bore at 1,000.
Edit 2: I like the Bergers way better than the Hornadys, and I really really wanted to like the Hornady 147s with their .347 G7. I've seen a few of them blow up during 20rd string fire, and the last straw for me was blowing one up myself during a match, which cost me my high master rating. I created a thread about it here. I could get the Hornadys to shoot, and shoot well, but I can't trust them after what I've seen first hand and personally experienced. That said, for informal shooting at steel plates, I'd shoot them...and I will. I've got like ~1,700 of the 147s left over.