I went out to check the twist rate on my .223 Handi, and I've never had so much trouble in my life.
I've read the FAQs. Please don't tell me to read the FAQs. I went out to the bench and set up with a rod, patches, bore oil, measuring device. Stuck a patch on the jag, got it started. Rod wouldn't turn. Took the rod out, checked to make sure it would turn freely. Got a thicker patch, put some oil on the patch, tried to start it. Too thick. Piddled around with another jag, another patch, rod wouldn't turn in the bore, but would turn freely in my hand. Then decided to try a bore brush wrapped in a patch. Started it in the barrel and it got stuck. Tried to push it through, bent the rod. Got vise grips and tried to pull it out. Pulled the end off of the brush. Got another rod and pushed it back through from the other end. Put a jag in the 2nd rod, put a patch on it. Tried to push it through. Broke the jag off in the end of the rod. Threw that rod in the back of the truck. It's going to the dump with the other one.
I've checked twist rates on many, many rifles. This little .22 bore has me buggered. The bore is so small and the equipment so fragile that I'm now out of .22 rods.
I guess it's time to buy a good rod for .22 bores. And a couple of good brass jags.