Forcing cone question

[Dizzel]

So I’ve recently put an express barrel (up to 3.5”) on my wingmaster (2”3/4).
It got me thinking of shooting shorter shells in a gun chambered for larger.
I know it’s dangerous to shoot a larger shell in a smaller chambered gun as the opened shell partially obstructs the forcing cone and will increase pressures in the chamber.
But what about the opposite? Are there any disadvantages to the pattern having a shot charge partially expand past the open shell until it hits the forcing cone?

 

[FLHTCUI]

There is a plastic wad in there .....
Rob

 

[catnthehatt]

No issues, just the 2 3/4" shoot them.
Cat

 

[dutchhunter]

No problem. Kind of like a back bored barrle. Little less recoil

 

[Rob!]

Shoot 1 3/4" shells in my 12g lots. No issues.

 

[kamlooky]

Heck, set up a kupple bigg'un sheets awff cardbored and shewt the same shell yewsing
the altered version verses the stawk bawrell.
View the pattern'in and git back tuh us.

 

[struff55]

Not really like back bored .

 

[cosmic]

Let us know how the gun shoots 3 in and 3 1/2 in shells?

 

[the spank]

Let us know how the gun shoots 3 in and 3 1/2 in shells?

If it was made as a 2 3/4” receiver it probably won’t eject them. The ejector will likely need to be relocated to allow the casing to clear the ejection/loading port.