I got a Remington 870 20 ga. and cut the barrel for home defense. Did it with a pipe cutter and left the swedged lip inside as I never gopt around to removing it. Neatly table sawed the stock at an angle to convert to a pistol grip. Later rebolted it when I decided to try a bit of primitive skeet shooting at a state range. The stock slid up a bit on the grip as I tightened the bolt - the original cut was at an angle.
I now had a short barrel non-rib barrel with no sight, maybe 18" long, with a "slipped up" cheekpiece. surprisingly it shot well and I nailed the first hand thrown birds I launched - that is, throw with right hand, hold gun in l;eft, drop launchers, aim and shoot. It does work! Some sort of sight picture must be determined.
I read about the win 1300 and tripped across a relatively new used model for about $193 out the door. Definitely a fast and easy shucker - but that is due to the rotary bolt head which is functionally the same as the fast firing M-16.
This one had a 28" bbl with a high stepped rib much like my 12 ga. Citori O/U. Looked good and pointed fast. Came with a screw-in full choke. Rather nice mechanical feel with a decent trigger. Took it to the range and with a direct from front launch managed to nail the first shot - accidentally. Day was overcast and yellow or orange glasses didn't do much good for me. Should have put on my prescription glasses.
I will get a 12 when production resumes just for the sake of having the handling and the rotary head. I have a bunch of ol' crotch shuckers, puffers, and spring loading singles like the Win and Rem 1911 era models. Also some Ranger/Stevens guns and a crotchberg which I should hone in a bit.
Best thing to do is find a plausible mechanical excuse or some feature you like and buy everything you can get. Then learn to fine tune the gun for better handling and shooting..