To whom it may concern: The 157th New York Vols were issued .577 Enfields. Every company received Endields at Baltimore enroute to Washingion D.C. in September, 62. I also have a report for the 157th for "Unserviceable Weapons" to be turned in which stated that 2 Springfield rifles are to be tuned in and they were "picked up on the battlefield at Gettysburg".
I just found this site through a searc for the 157th NY, so at this late date, probably nobody cares.