0.22 217 DIY Slug

I think NOE or Lee brand?🤔
Noe is the only one that I've found that makes a mold for airguns besides mp molds but you need a powerful airgun to shoot them IMHO.

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I need 0.217 size
Now sells a slug sizing kit. https://noebulletmolds.com/site/sho...g/sizing-tools/sizing_kits/22-caliber-sizers/

Then all you need is the sizing diameter and push rod https://noebulletmolds.com/site/sho.../bushings/22cal-bushings/22cal-push-rod-22pr/

You don't really need a press. I just used a soft face mallet to tap on the push rod to push the slug through the sizing bushing.
 
The mold diagrams with dimensions linked to will work fine for cutting a mold. You can change the od dimensions slightly as needed. Many slugs are designed so that the nose dimension rides the bore while the rear driving band rides the groove. It has been my experience that a driving band 0.001” smaller than groove diameter performs quite well.

Dave