I don't have any experience with Weatherby, I have a Mossberg 500 that I use for everything. I bought a combo pack that has an 18.5 inch barrel and a 28" vent rib with interchangeable chokes. Mine is in 12 gauge, but I bought my son the youth model in 20 gauge, that he used to get his shotgun merit badge in Boy Scouts. When he outgrew the stock I replaced it with a standard stock, and he can change out the barrels when ever he wants. He likes shooting my 12 gauge as much as his 20. You can get the Mossberg combo pack for around $350 normal price and cheaper if you find it on sale. I like a pump, just because I am more familiar with the action. The Mossberg also has the safety on the top of the tang rather than by the trigger which, for me is more of a natural way to engage/disengage, but if you like a pistol grip type stock it won't be as easy to manipulate. If you are planning on shooting slugs, the recoil factor between the 12 and the 20 in negligible, because you are sending a 1 oz slug downrange with the only difference being the diameter. I wish you luck with your decision, I agree with Scott B, there aren't too many "bad" shotguns made here or in Europe, I would suggest getting together with friends who have a variety of shotguns in different configurations and shoot them, in both 20 and 12 gauge to get a better idea of what will work for you. You may be able to rent some at a range, but I don't have any definite info on it.
