Depends on how/what you define as needing to practice. If it is LR, then reading the wind is the most important, but in my experience, it is best to practice LR with rifles that you are actually going to hunt with. The wind drift of a .223 is ridiculous compared to a 300 Win. I have a .308 (way better than a .223) that I shoot at 500 yards, but it is nearly a waste of time to shoot at targets farther than that in windy conditions. A big reason to practice is to learn what you can and can't do. For example, what is the strongest wind you can hit a 10" target at 600 yard or 800 yards 90% of the time? A .223 isn't going to teach you that. Far better to get another 300 Win and use that as your LR practice rifle. Personally, I have 2 28 Noslers, 2 Lapuas, 3 RUMs, and an Edge. All have about the same wind drift so I can practice constantly without wearing out the barrel of my primary hunting rifle, which is one of the 300 RUMs or one of the 28s.
If your goal is to practice field positions such as offhand and sitting, then go with the .223. I shoot more .223 than any other round, but 99% of my shots are on PDs, which teaches me I normally don't have all day to shoot and it is great for trigger control. But the fact that I have to shade my shots (or hold off considerably) at 200 when the wind is blowing isn't realistic big game hunting practice - in a 15 mph wind my hold off is over 3 MOA - but half of that with a 28N.
You won't get good at shooting in the wind if you worry about barrel life. Took me a while to learn that.