Thread: good projectiles for longer ranges?

Hi there I was looking for some opinions from experience about good projectiles or better projectiles for shooting deer at ranges out to 400-500yds
currently Im running a .260Rem with "140gr Sierra Spitzer Gameking Boat tail" I like this round at shorter ranges but am hesitant to push it out too far, I've trialed the A-Max 140gr but that was too long for my mag
I was thinking of trying out some Barnes TTSX 120gr Boat tails (they fit in my mag) and some Hornady 123gr SST's any thoughts?

can of worms go on..............................................