I own a lefty Remington BDL in .270wsm and love it. The barrel was rechambered from an original .270. Browning is not the only maker of left handed rifles in the wsm calibers. Try Ruger and Savage. I have looked at them also and almost bought a Savage.

I use Winchester Supreme® Ballistic Silvertip® Rifle Ammunition in 130 grain. I have only had one deer move after the first shot and actually harvested two deer with one shot with this rifle/bullet combo.