Wildcat Bullets is designing some very unique 6.5mm bullets for my 6.5mm Allen Magnum round.
They will use heavy jackets and bonded cores and their weights will be in the 150, 160 and 170 gr ranges. These are prelim weights and as more testing is done we will figure out exactly which we will use.
We are also looking at building a 160 to 165 gr ULD rebated boattail bullet.
The Bonded Core bullets may not be suitible for the smaller 6.5mm rounds as the very heavy jackets will shoot the best in big high performance rounds that will force the bullet bases to bump up properly.
The ULD bullet should work fine if you have enough twist which will probably be 1-8" at least in the 6.5-284. They just designed a 145 gr ULD for the 257 Allen Magnum with a B.C. of .738 from initial testing. The 160 to 165 gr ULD in 6.5mm will be in the .800 range for B.C.!!
Contact Richard Graves at Wildcat Bullets and tell him what your looking for and he will give you all the information he has on extreme range target and hunting bullets.
Richard makes a 142 gr ULD Rebated Boattail with a B.C. right at .700
They do have a 0.060" longer baring surface so you will need to seat this much deeper in the case which is generally not a problem especially if you turn your necks and use a donut removing inside neck reamer along with the outside turner.