Started my little girl (and very little at that- she's tiny) at 10 in single stack minor with a 9mm 1911. Not that I'm not biased, but she's safer and runs that gun cleaner than tons of experienced shooters I've RO'd. Biggest bit of advice I can offer regardless of where you end up on the firearm/division decision: Spend a lot of time with snap caps at home loading/unloading, clearing malfunctions, drawing, presenting, and dry firing before you get to a live range. Once that timer goes off, the single best advantage you can give her is the clarity to focus on shooting safely, instead of having to think about how to run the gun. Makes an absolutely monstrous difference in how much they enjoy the match I think.
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