Currently we work 18 days a month. Long call exists but it is assigned and rare. You can proffer for open trips. They are generally assigned based on seniority and number of days available. I.e. 3 days available get the 3 day trips. If there are more reserves than trips senior can pass but very rare these days for fo's. Often trips are transferred to other bases with available reserves. Proffer closes at noon for the following day. Scheds usually calls about 2 pm to give you your assignment. They will often fly you into your day off when they run out of pilots with sufficient days available. Short version: fo reserve sucks! Only saving grace is we still have an 85 hour monthly max which I typically hit before the end of the month allowing for an extra day or two off.