Well, like they say, when you go 338 you never go back. I hear the 300 grainers are hard to beat in the wind.
If it were me, I would probably tone it down some and get the 110 FCP in 300 WM and shoot that this season. It would be cheaper to shoot than the 338 LM for sure.
Then, after you get the 7 STW back, you could make a decision on which rifle to keep. Should not be hard to sell either of those rifles, dies, brass, or bullets.