Rio Royal 20ga 00 Buck?

[orangevale]

So it’s time to replenish Momma’s stock of 20ga buck; I’m shopping the internet and stumble upon a Spanish company “Rio” that’s loading 00 in 20ga (as opposed to the more common #3 buck). I’m interested, but the last time I went down the “00 in 20ga” road, the rounds wouldn’t cycle her gun. I’d like to pick-up a couple of boxes to function test prior to making a bulk buy.
Anyone know of a source for “Rio” in the OKC area? Anyone have any first hand experience with this particular round?