$200.00 per rd. I paided &180.00 per rd. 2 yrs. ago. I know it was insane. but enjoyed shooting it. first time in 85 yrs. I haven't shopped for any .25 rimfire, but have purchased .30 teatfire ammunition that has not been manufactured since 1870 for only $10 per round and think I over-paid. Some specialty ammunition manufacturers will occassionally produce a run of .25 rimfire, so it should be available at larger gun shows for no more than a couple dollars per round. Original ammunition 60 - 70 years old should be hard to find, but available.