Not as accurate as out of an improved cylinder. It isn't possible to state numbers. "Full choke" varies somewhat with manufacturers, as does the exact diameter and metal content of slugs. We would expect sabot-loaded slugs to be somewhat less affected by the narrow choke, but there are no guarantees. Too many variables.
Either a full choke,or extra full choke shotgun barrel.
How much the shot is constricted as it leaves the barrel.
yes
the barrel is constricted at the end to make the pattern of shot flow density wider or tighter. Usually from cylinder up to full choke
IF ANY SHOT GUN HAS A MOD CHOKE OR IMPROVED ITS OK, ONLY FULL CHOKE WILL NOT BE SAFE, BULGING IN THE BARREL MAY OCCUR.
Not in Belgium barrels
The choke is a way of narrowing the barrel. It is designed to keep the shot in a tighter pattern. A full choke is supposed to increase the effective range of the weapon.
NOT RECOMMENDED unless you are in a life or death situation.
The Choke of a shotgun is the amount of barrel restriction at the muzzle end which affects the shot pattern. A full choke will keep the spray pattern of the pellets closer together farther out than if the barrel was not restricted at the muzzle. If there is no restriction at the muzzle, the choke is said to be cylinder choke or cylinder bore.
Most ARE shot from full choke- or even Extra Full Choke.
It is possible to fire a shotgun without a choke, but it is highly not reccomended, and they don't cost that much If you select a barrel with no choke (cylinder) it will cause the pattern to be looser than for a barrel of a shotgun that has a tighter choke. The extreme is "full choke" which keeps a tight pattern out to the effective range. Full choke is typically used for waterfowl. A shotgun that is pressed into double duty (shot for small game and slugs for big game) would work well to have modified choke. Slugs have to be designed to fire through a full choke without blowing the barrel but you will certainly shorten the life of the barrel by firing slugs through a choked barrel. If you can afford an extra barrel, then use a cylinder (no choke) for slugs. Remington and other shotgun manufacturers have interchangeable choke tubes (see link) that allow you to screw in the appropriate choke for your quarry.
Take your gun to a local gun smith or dealor. They should be able to check to see if your barrel is a full choke. If so, they can shorten the barrel and remove the choke. That way it will become a open choke to allow the use of a slug.While they are shortening your barrel have them mount your site also. Good luck!!!!!!!