I bought 50 rounds of the Barnes 127 grain LRX from Dallas Custom Reloads recently. Shoots great out of my Fierce Carbon Fury. It’s a little pricey but I’m not using it for target shooting at the range. Good stuff! I was thinking about getting more so I checked his availability the other day and it looks like he still has it in stock.
If you have brass unknown munitions can load it up for you. I just sent them a good bit to have loaded with the 127lrx. I do think they mentioned not having any new brass though but worth asking if you don’t have any.