TexasCHLforum.com

A double eg. O/U is nice because of its ability to have 2 different chokes in the gun at the same time (I just use Imp Cylinder and Modified - and I can select which fires first, depending on the sequence of the clays presented to me). Other folks frantically change the chokes completely between stations - I've never bothered but it's a plus if you really want to fine-tune things.

A good O/U is fairly pricey, though - I wouldn't feel undergunned with a decent used semi-auto and a screw-in Modified choke eg. Rem 1100. FWIW, I did start clay-shooting with a Mossberg 500 12-ga pump - it's not that restrictive if you can shuck it decently quickly.

My advice - take your current gun and go do a few rounds of sporting clays with it first; sounds like you have enough time and you may be able to try a few rental guns as well.