Yea Terry, I think they'll take 1200. I compared them to some Lazer-Cast bullets I have they seem pretty hard. I added about 8' of Tin solder to a qt. sauce pan 3/4 full of lead. That's about the best I can remember.Terry_P said:What ratio of tin did you add to the melt? I'm guessing you'll be good to 1,200fps.