I think the reality, if this ever makes it to become black letter law, is that a CCW permit will be treated much like a driver's license, in that it will allow carry by persons from another state, but subject to local and state rules. Just as some states require turn signals on motorcycles, and others do not, states which regulate magazine size would not have their laws abrogated by this measure. Just because you have a Colorado driver's license doesn't mean you're not getting a ticket for not having turn signals in Utah. Much like current reciprocity, the responsibility for knowing and complying with local carry restrictions will still fall on the permit holder.