I'll just go through our barrel horses...
Link,my gelding in a Little S Hack because he is very touchy and I could probably run him in a halter, and I can with a plain snaffle. But the Hack gives me just a bit more control incase he starts to get to close I can move him over. Otherwise he's automatic and a push style horse.
Heart, my mare in a medium shanked reining type bit with copper rings in the middle. She's pretty easy to run, she was ran in a hack gag combo when I got her but she dropped her shoulder in it. Plus I think it was to much bit for her.
Tori, my mom's mare ran in a bit like Heart's but with a bit longer shanks. She's kindve a free runner and has cheated before. So this bit works for her.
Leggs's, my step dad's mare in a Jim Warner Hack, she's a push style horse and she knows what she's doing. It's best to stay out of her face.
My old mare I ran in both the Jim Warner Hack and a medium shanked Gag Combo Bit. Depending on how she was running at the time.
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