So to answer Jimichangas question if the shells fall out of the triple threat receiver, the answer is yes to a certain extent.
Like I initially thought the 3” Remington 00 Nitro mags were to hot and expanded too much to fall out of chamber on there own after fired.
So I went today to sight in the SigSaur red dot today and test my theory on the 2 3/4 slug shells falling out on there own.
And sure enough they passed with flying colors.
So to point out I thought the top center barrel shot first it does not.
It most likely is L,R, Center. I left the bottom two cylinders with the spent 3” Nitro mags, because I mainly was trying to dial in red dot with the slugs.
So these are tactical 2 3/4 flight controlled rifled slugs.
I got the red dot dialed in at around 5 rnds it was pretty close the first shot.
But then it seemed to drift to the left a hair. I could not get it to fully tighten up,the sight is one of sigs older ones , a way older red dot. Not sure if it was it or the pic rail on the shotgun itself, it def is not a mil spec rail on shot gun, I suspect it’s the rail on shotti, something to consider.
So I just removed it and went off front fiber optic sight.
I was aiming directly in the center of Red circle at 10 yrds and it was tracking pretty high.
But never the less, the results would be devastating! All rounds would be fatal to say the least.
I shot about 18 rounds of slugs and I could not shoot anymore, it was brutal. But I forgot a trick that helps with taking half the impact on your shoulder when firing.
If you lock your left arm out holding the forearm of shotgun it will take a lot of the abuse out of your shoulder. If you have not tried this it really helps on recoil.
Now my take on coach guns, it’s a intimidator and a deadly one. Great truck gun if you ask me, is it for multiple threats maybe but I think your odds would deminish fast if your attackers are armed and more than two.
If you were staring down these three barrels I think you would turn white as a gost and re think your poor choices you just made.
I can’t seem to upload videos of shells falling out of receiver or 10 yrd verification.
So just looked at that Sig Red Dot, pretty sure it’s the sight. It does not have the pronounced bar to lock it pic rail surface. Just small threaded screw with round surface. Not going to surfice under these brutal recoils. They gave this away with another purchase I made if I remember correctly, now I see why Lol.
Just for the record the bag was for the red dot.
This target was free standing at 10 yrds.
....I know that now is probably the worst time to try and sniff out such a shotgun, but I figured some solid advice from members would always help if I stumble across one. Wanted to keep it under $1,000, and exposed hammers would be extra cool unless those are just superfluous...No plans for any cowboy action stuff, would be recreational and something to impress my friends who all quit visiting me many years ago.....
...as always I would welcome advice and personal testimony from members. 
