I have plenty of the 168 smk, but have been reading that thr 175 smk may be a better choice for that range. The gun is a remington 308 700 sps varmint and i am open to any bullet for this kind of range. I have also tossed around the 155 scenar, 178 amax and the 175 hornady match bullet. I would prefer to only try two of these bullets, which do you recommend for 1000+ yard steel?