AFAIK the bullet length and shape match the SST.
OK, so the length and the shape match the SST, which is a good thing. SSTs are known to be accurate, and have good BCs.
However, since presumably this gilding metal is less dense than the average density of the lead-with-copper SST, is the bullet lighter (and thus faster)? Or not? If it's faster with the SAME BC, then I'm definitely interested (particularly if they also have more rapid expansion). If they are the same weight/speed, then I don't see much of an advantage. Also, how much more is the cost of these than say, an SST?
Edit: Oops, ok, I'll look at your links to get my answers, but if you want to discuss it as well, then so much the better.
May I just gripe a bit about the Barnes bullets however, while we're on the subject. The TSX bullets and MRX bullets both I want to gripe about, but mainly the TSX: Why, oh why. Oh, why. Can't Barnes get the BCs any better than they are? They are OK BCs, but actually pretty crappy compared to say, the Hornady SST/IB, and really crappy compared to the Berger VLD, which is being hailed and marketed now full steam ahead as a hardcore performance hunting bullet on the hunting tee vee shows. Also very very crappy compared to the (now-discontinued) Lost River J36 hunting bullets. It should be
EASIER, not harder, to get an all-copper bullet of X weight to have a great BC than a similarly-weighted lead/copper bullet, simply because copper bullets are LONG, and as it happens, LONG is also the shape of good BC bullets. Why do the Barnes BCs suck so badly then? I have no doubt that they perform, but they shed velocity much quicker than other bullets in the long range hunting market. Barnes REALLY needs to steal an engineer out from under Hornady, who will teach them what shape to make a bullet to give it a good BC.
Edit again: Also, I just now recall that I had looked at these and lost interest when I found out they don't make one in 6.5mm.