Yep, That's it.
I like mine on the front edge of that ring leaving no valley to collect debris. That's worked for me with hundreds of rounds in various calibers.
Thanks 16bore. Appreciated.
Jim

BE STRONG IN THE LORD, AND IN HIS MIGHTY POWER. ~ Ephesians 6:10

Socialism is a philosophy of failure,
the creed of ignorance,
and the gospel of envy,
its inherent virtue is the equal sharing of misery.
--Winston Churchill