Here is the real deal.
.001-.003 will run like a new engine.

.004-.007 can be re-ring and run great for a while

.008-.010 will blowby some, but run good for 20,000 miles

.011-.013+ will make you wish you bit the bullet and bored and bought new pistons

Have the taper measured from the top of the bore (top ring travel) where you will find the most wear to the bottom where there will be zero wear.

You won't break rings as some suggest. Just hone and re-ring.

If the bores are good enough to hone and re-ring, use a moly ring when you rebuild it.

Back in the day (1970's and '80's) I built a lot of re-ringed engines for my own use and low-buck guys, and this is my take from seeing the results.
-dulcich