I've lit off both tubes in my Grandad's old no-name sawed-off double barrel many times. If that cheap old thing will hold up to it, I'm sure your Stoeger will be just fine.
It's hoot to pull both triggers at once! Really fun when shooting at clays. It kicks like a mule, but is hardly something that will knock you down, break your fingers, dislocate your shoulder, or cause any other kind of dire consequences. Mostly, it just causes a big, stupid grin and a bunch of giggling.
Because threads are always better with pics...