I'm sure some have. In the end most of us found that the .338 L just didn't have what it needed to push the 300 fast enough to reep the benefits of its ballistic efficiency. So we went lighter for better mv or we traded into a .338 with a little more ass.
Then most of us found out 6.5 is funner and cheaper.
300s are better for .338LM Improved with a long barrel.
That being said, LRT and 24n41 are on the slow side for that combo. Sure, you can push them and never get pressure, but you won't get the velocity you'd want like you would with H1000.