What might actually happen?

[Uglyjohn]

Being new to air gunning, I've read a vast number of posts on this site dealing with a double load. While some guns provide a design feature to prevent this, others (like my AA S510) do not. I've read many warnings re not letting it happen and methods for undoing the mistake if discovered before firing the gun. Question is what happens if the gun is fired with 2 pellets in the barrel? 

 

[Centercut]

Two pellets will come out of the muzzle. 

 

[kk4iz]

Just don't make a habit out of it

 

[Dirte]

They shoot out the barrel with little power. My poi is about 16"-24" low at 50 yards. Ya it happens!

 

[Brian10956]

I did once in my Gladius they got stuck used cleaning rod to knock them out no damage.

 

[sirk]

it can damage a baffle in the shroud, if you stack 2 maybe you stack 3 or more when you give a gun to kids or inexperienced person, then you will have to get the barrel out to sort it out.

 

[scrane]

It might damage your LDC.

 

[JohnL57]

The one time I did that with my Marauder, one pellet impacted pretty close to the point of aim, and the other went low and right. Seemed like it did damage the baffles.