The chaos theory, more or less.

It would seem to make sense to use what you are comfortable with, what you feel you could use the most effectively.

I guess I have experience of this, to some degree. I was at our local range pinking with an old BSA Lightning air rifle. A springer, with a cheap scope that I'd had for years. For an air rifle, they have quite a nice kick, a really great gun.

Anyway, I was messing about with these guys who both had £800 in their guns, easily. Set up a target with a bell in at 60yrds, and I could hit it 8/10 and them maybe half that.

You don't need the 'best' gun, if you know it, if you're confident with it, then you have a much better chance of actually hitting your target. Which is always a good place to start.