Chris, as long as the adapter has a male pintle to push the schrader valve core button, that should work (to keep the valve in there). This pintle would be like the one on your tire pressure gauge (in case I am not making sense like normal).
Otherwise, one does remove the core (I have seen gauges and adapters work both ways. I prefer the ones with a pintle because if something breaks you can remove the gauge on the side of the road and you still have the schrader valve core in place in the rail. Otherwise you have to install one to get home.
(You know all this - I just felt like posting).