250 and I had the same problem in the midwest. This time of year it's Tstorms, and then of course you have icing. There was a two or three week span during the spring and fall where we both lived at the airport as instructors because all our instrument students were wanting to get out. Then on top of that the conditions are even more particular because you're in a single engine aircraft with a single vacuum system so you wanted the perfect conditions with an easy (safe) way out.

Happy Hunting!