Czech loads (often identified as "M48") are supposed to be the hottest. However, Winchester (which in this case is just repackaged Sellier & Belloit) and Prvi Partizan both equal this, firing an 85 grain bullet at around 1600-1650 fps. I was able to find the Prvi for about $15 per 50 at my local gun show.
I'm boycotting THR.org until things get sorted out, but I'm active over at THR.us.
I am not a lawyer; nothing in this post should be construed as legal advice.