Modified choke or improved cylinder choke?

I already have a modified choke, so I was thinking that I would try some rifled slugs through it like millerhunter13 suggested. This would be okay?

Yep, I never knew not to shoot a gun w/out the choke. Like I said, I was born a bowhunter and only shoot an 835 for turkey. Oh, the 835 can shoot 3 1/2 's, so a 3" would work fine I would assume.

Thanks for answering an elementary question guys.