Hi Moonclip;
When I shot the slugs (the older type with e the hollow base) it was a long time ago - I was probably 16 or 17 so it was in the early 1970's - anyway, I had some leftover slugs from deerhunting and I decided to try them out in my relatively new (2 yrs old I bought it new) Spanish Zabala side by side 12 ga.
I put a few, at least 4, slugs thru both barrels, sighting at a large dead tree on the other side of a field, I'm guessing cause that was many years ago, around 50 yards at least. I hit the tree. I remember both barrels were way off, one high and to the left by about 18" the other low and to the right - but i was shooting standing with no rest so don't expect much.
Anyway, I decided a SxS was never going to work as a deer gun (iused an Ithaca with a polychoke for deer hunting but I thought the SxS could serve double duty if I was rabbit hunting and came across a black bear what can I say I was young).
The next season I went hunting for ducks and geese and I could not hit a thing - this was in Wisconsin and I had a goose permit for oneo f the zones around the Horicon Marsh area - they probably dopn't have those zones anymore since there are so many geese now.
I even tried it out by aiming at a sparrow about ten feet away - that sparrow lived. I missed it comepletely. Now I am not the best shot but I worked at a local trap club and new how to shoot good enough that this was not operator error.
Years later when I was in the Air Force (late 70's) I read somewhere (no internet so iit must have been a hunting magazine) that slugs will ruin your choke. That is when I figured out why that Zabala Sxs couldn't shoot straight anymore.
Maybe the Spanish gun was made cheaper - it was an inexpensive gun - but I know that after those sligs it never shot worth sh-t ever again. By the way I traded it for a Dan Wesson .357 - when I traded it I didn't know about the slugs ruining the choke I just new it couldn't hit anything - I hope the guy wanted it for HD and was planning on cutting the barrels down.
Anyway, thats my story and I'm sticking to it - if sdomeone does shoot slugs through a full choke I'd love to see them pattern the barrel afterwards.
Steve