That’s what I’m trying to avoid! I need a neck die for 221 Fireball (which Lee doesn’t make) and luckily the cartridge base to neck dimensions of a 22 PPC - which was a Lee factory offering until recently - are close enough to work.Lee will make you a custom die for ~$100.
Good luckLee Precision, Inc. - Collet Necksizing Dies
For custom collet necksizing die sets, we ask for payment in advance, two fired cases, and one sample bullets for testing purposes.Current lead time for Custom Necksizing Die sets is around 8 weeks.leeprecision.com

WAKE UP People!! One guy just lost $550!! If you get a PHONE Text from someone claiming to be a SELLER, Do NOT SEND MONEY!! NEVER put your phone number in ANY post. Scammers pretend to be Sellers! Contact Real Seller via PM. NEVER EVER send a penny without a VOICE phone call with seller and demand custom photos.