We had a bit of a run off at our range in the last year. One guy was always winning with a vudoo, so gradually more Ruger precision, and custom 10/22's started popping up. Then the discussion to start a base/open class ensued.
I beat a vudoo and rim-x, along with several $1k+ 10/22's with a b14R because I shot the hell out of it and did some testing. I was getting hits where they didn't know their drops, and reading the wind better.
I was consistently 1-2 hits behind the guy with the vudoo with $5 eley target in a rem 597hb to start with. I had hit a point where I was letting my gun handicap me. Now the top 5 shooters before are still the top 5. We still have fun and just see where we end up at the end.
My conclusion was quit caring about the class and shoot what works for you. You'll be happier shooting what works instead of worried about a scrape.