best bullet for antelope

The last two antelope I shot were a buck at 310 yards and a doe at 200. Both were hit with a 168 gr. Nosler BT (.308 Win Lapua brass/CCI BR2 primer/44 gr. Varget). My rifle is a Rem. LTR 20" so velocity is not as high but there was no damage to the meat with either one. With the buck, there was an exit wound right behind the shoulder about 2" and a 1" exit wound on the doe. He ran about 30 yards and dropped dead. She made about 10 yards but was still breathing when I got down the hill.

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