There is no figuring for it really. Even the same gun with a different tune can sound completely different. You have to test with your gun, at your own power level. It wouldn't be so bad if the price hadn't sky rocketed on the nice ones. After my STO crapped out, I took stock of the fact that none of my DonnyFL's have. His new ones are even better. It's a tough call, when you throw in price. Maybe I will find something in the classifieds too. The IA1350 has surprised me. I didn't think that it would work as well as it does, without any kind of sound deadening material inside, but since it does work well I am a lot more confident about trying a Ryu/Yoko too. I just know which size I would need, I'd obviously like to stay Ryu size, but a Yoko would make more sense w/o anyone telling me directly a Ryo could do it with an extra baffle or something.