.22 DRY FIRE

My wife is a new shooter and, if possible, I'd like to do the dummy round drill (mixing live and dummy rounds) to help her with some of the anticipation issues.  I've done this with center fire guns, but I don't want to damage the firing pin on her .22.  She shoots a Nelson Conversion, which Larry says are dry fire safe (without a snap cap).  The alternative is to just stick with centerfire guns for this exercise.  My question to the group - Does anybody have experience with .22 dummy rounds that are suitable for this?  Steelworx claims their rounds are safe for dry fire.  TIA.

The Hillman Group 370326 Ribbed Plastic Anchor, 4-6-8 X 7/8-Inch, Yellow, 100-Pack

These plastic wall anchors and many like them of this size are effective 22lr snap caps. They absorb the firing pin energy and won't scratch anything. You can also cutout the rim around your extractor if you wish. I've never gotten up the audacity to try feeding them from a magazine.

Try the Pachmayr plastic ones:

https://www.midsouthshooterssupply.com/item/0001003200/22-long-rifle-plastic-snap-cap-(24-pack)

I've used Steelworx dummy rounds for that specific drill with no issues.  The main concern with dryfiring most .22's is that you do not want the firing pin contacting the edge of the chamber.  Repeated dry strikes will eventually mark and deform the chamber face.  Steelworx rounds feed and chamber just like a live round so the firing pin hits just like it would on a live round.  The metal is harder than brass so I wouldn't use them for daily, repetitive, dry fire practice but for this type of drill they work fine.

Wall anchors will protect your chamber, but might not feed well from a magazine.  I use those in revolvers.  I would suggest the aluminum snap caps from A-Zoom.  These are "proof" dummies and will feed very well in a semi-auto.  I use those in my semi-autos that don't lock the slide back after firing the last round.  That way if I lose track of how many rounds I've shot, I don't have to worry about damage.

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^^Definitely doesn't feed from a magazine for the ball & dummy drills the OP was asking g about