There are those that believe that Calvinists can never hold to such a system and frankly by the traditions of the historic Reformed movement they are correct. However these days there are many Calvinistic Dispensationalist and I have met many and am one myself. In reality a Reformed church is different than a Calvinistic Dispensationalist church. Some hold to Calvinistic soteriology, & a Tim Lahaye Dispensational system, and yet others disagree with Lahaye (yet have not read his book Charting the End Times) but hold to a different system of dispensationalism. I know this topic can be as complex if not more so than the the Lordship vs. Free Grace debate, and anyone whom thinks they have it figured out have not studied it.