Different guns like different things unfortunatly.
I bought 40 boxes of FGGM 168's and low and behold my SPR does not like it. I also have 12 boxes of BH 168 and that throws 4 inch fliers at 200yds every few rounds, pretty much stopped shooting that stuff. The Hornaday BTHP 168 and Zmax 168's work GREAT in my SPR. Unfortunatly I am out of that stuff and it is no where to be found. Like being stuck on an life boat surropunded by water you can't drink, I have 1000 rounds of ammo my gun hates that I can't shoot and none of the stuff it likes to shoot.
Hornaday BTHP 168 gets my vote. ZMAX worked great too actually but the Zombie thing is kind of lame. Leave them in the box and people comment on it all day long. Ironically it workes better than the TAP for me. I have some of the TAP too but the BTHP was the absolutle best most consistent for me.
I am sure someones gun hates the Hornady BTHP thogh. I am learning this is why people keep insisting you do your own loads.