I asked Barnes about using the LRX vs the TTSX. This is their reply.
As for the 180 gr TTSX that is the perfect bullet in your 300 Win Mag for close range as well as long range shots. The 180 gr TTSX only requires a minimum IMPACT velocity of 1500 fps to reliably expand. So out of a Win Mag that bullet will expand on game reliable from point blank range to over 1000 yards. Also with the weight retention of a Barnes Bullet a 180 gr TTSX will out penetrate any jacketed lead core bullet of 200 grains. A Barnes will penetrate 30 percent deeper than a jacket lead core bullet of equal weight. A 180 gr TTSX is plenty of bullet for any game in north America. Including Brown/grizzly bear. You would be amazed by the amount of customers we have using that bullet on Brown/grizzly bear. Due to the loss of velocity with the 200 gr LRX you actually would be losing performance.
