They'er called
Ballistic Silver Tip, and there are 2 kinds one for Hunting and one for Varment.
In .243 they have the 95grn Hunting,, 55grn for Varment.
http://www.nosler.com/bullets/combined-technology.aspx If your going for Deer be sure you have the heavy,
We used some of those in factory ammo for the 708 and I guess they did the job as Dustin did harvest his deer, but I was not impressed with the preformance, The bullets fragmented quickly with little penetration and required a second shot.(300yrd shoulder, then neck)
As far as the special Lubalox coating, I understand it's OK as long as guys use just those bullets, but when I went back to plain copper jacket bullets the gun fouled immediatly and it was a dicken to clean that stuff out of the bore.
I would not use that bullet in heavy cover where it would be a 50-75yrd shot, they're designed more for high velocity and distance. I'd be choosing something like the Partition or even the Hornady Interlock, something that doesn't have that needle point.
