No. Reserves can't pick up off the swap board. They can't pick up open time via white slip either. You can submit a yellow slip and volunteer to fly on your off days, however you don't get the days back & the time only goes toward your 70 hours. You can also submit a green slip. This way is better because you get the day off back, plus the pay is in addition to your 70 hours even if it is the only trip you fly all month.