Wildcat Bullets offers a 142 gr Rebated Boattail bullet using the fine J-4 jackets. He offers them with an 8 ogive or his ULD ogive which I believe is in the 14 or 15 range.
He send me some samples of his 142 gr ULD RBT and I tested them in my 6.5-06 AI. Out of its 26" barrel I drove them to a very conservative 3100 fps with groups in the 3's at 100 yards.
Only had 12 bullets to test but they shot very well at 100 yards from my rifle. I should also state that this rifle will shoot the 140 and 142 gr Sierra matchings and the 140 gr A-Max into .4" to .6" group at 100 yards average.
Seems the 142 gr Wildcat ULD shoots noticably better even at 100 yards, at 500 this could be quite noticable.
After the rifle building rush for big game season, I will be ordering a full box of the 142 gr ULD's to test at longer ranges.
They run $36.00 per 100ct +shipping but this is in Canadian funds so with American dollars it is quite a bit less.
You can e-mail Richard at firstname.lastname@example.org
Great guy to talk to and from my experience, he will build you damn near anything you want if he has the tooling to do so.
Hell if you want a 180 gr ULD in 6.5mm he will probably find a way to make it. You'll just have to get the barrel to spin it!!