Yup. I guess it started with the patch? I'd never seen a 300+ anything drop during nightfall before that. They increased the level of drops by 10 points, which must be what pushed them over - a 293 gun becomes a 303, etc. It does mean that the raid is not the only real way to 300+ anymore. Though it's all still RNG, the Nightfall is much less of a commitment (though it seems likely that my rewards were not typical -- my buds got mostly high-290 stuff, with maybe one other 300+ item in there).