ree wrote:westberg wrote:I believe the 3" chambered barrels will fit the 2 3/4 receiver and are ok to use with only the 2 3/4 shells. Do not use 3" shells.
That's what indicates at the site that Joe provided above.
A 2 3/4 " 870 with a steel receiver can be converted to a 3" gun pretty easily by any gunsmith. There is a spring steel part on the side of the receiver catches the shell on the backstroke and flips it out, you dremel that back 1/4", and then the 3" will eject. (It is easier to short stroke it then, remember to pull the slide all the way back when you eject a shell.)
If you don't have a 3" chamber, they can easily ream that out too.
The pressure is the same, there is no safety issue, an 870 is strong enough for anything.
But for slugs (non sabot) I always use 2 3/4 shells. More velocity, and in my guns, much more accurate than 3" shells.