OK. Two topics in a week, I must be the new kid on the block. I searched the forums before I created this new topic, and read a thread from 2004. Plenty of advice, but no definitive I've done it and it was easy or hard etc. So, has anyone actually done the rechamber or had it done by someone to their rifle? Also, what about 22 Hornet to 222 Rem? The 221 is a total no brainer and they say you can get a 223 extractor from Brownell's or H&R. There was also support for the 221 job being done by hand if you are careful. I figure if I have a 22 Hornet K, a 221 Rem Fireball and a 222 Rem all from H&R/NEF, I will have a nice selection of graduated rifles, and cheap to boot!