Even if it has the slower twist rate and won't stabilize anything over 80 grains you are still good to go for deer if you use the Barnes 80 grain TTSX. This is actually my recommendation for any 6mm for deer, even if it will stabilize a heavier bullet. It's flatter shooting because of higher MV and the bullet design will hold together for deep penetration and knock the crap out of them. The 6mm Remington is a great deer round and slightly exceeds the performance of the 243 Win.