Hi Pharmseller! What happened? Did they finally kick you off of iFish?
JK, of course...
I had something similar happen this year with 300 gr OTM Hybrids out of my 338 Lapua. I'm used to lots of energy dump and big explosive looking wound channels and I do sort my bullets, making sure the the ones with nice open tips go into the 'hunting box'. That said, I also try to put them into bone (shoulder, neck, or frontal shots). Penetration has never been an issue.
This year I hit a spike elk from about 600 yards away. He barely even flinched or acted hit. He walked about 20 yards and I punched him again, same result. He then casually walked behind a tree and stood there for 15 seconds or so before tipping over. After taking a walk to the kill site, I noticed that I must have missed my wind call since both shots were about 6 - 8 inches behind the shoulder and in the rib cage (was aiming for the shoulder). Complete penetration. About 2/3" diameter exit holes, which is not much when the bullet is .338 diameter to start with. The blood trail was OK, there was an exit hole, and the elk was recovered so the OP might have been happy (except it was a Berger, oops never mind). The end result wasn't bad, just not what I was expecting or what I prefer. I prefer DRT and no need to follow a blood trail. Moral of the story; If I had punched him in the shoulder I'm sure there would have been plenty of energy dump and a DRT kill.
I'm not sure what ranges your nephew hunts/shoots at, but the Partition wouldn't be my first choice if the shots were 500 yards or more, especially with a 'non-magnum' cartridge like the 7mm08
. Maybe that's what you meant by "for him" (meaning you will make longer shots and not necessarily switch back to the Partitions - reading between the lines here). Nothing against the partitions, they're one of the most reliably performing bullets made (terminal performance, that is), but their relatively low BC is not conductive to carrying energy further downrange. And then there is wind drift to deal with at the longer ranges.
I'm going to try the 285 gr ELD-M's in the Lapua this season. Despite the good track record I've had over the years with Berger Hybrids, I still believe plastic tips expand more reliably (and at lower impact velocities) verses 'open tip match' type bullets. Throw in that the 285 ELD's group well in my rifle, cost less, & have nearly the same BC as the 300 Hybrids and its an easy move to make.