Well went out and picked up a 20ga Mossberg sluggun for next year.Went out and shot today with the winchester superX slugs,the gun really is a great little shooter.
I am wondering if anyone has tried the tipped Federal Barnes Expanders and your
thoughts?

Shoot Very Well but SST's shot just as well and they are about $3 less a box.

I shoot the Barnes Expanders in my Mossberg 12 Gauge. I dont use the tipped ones yet though. I get around2.5in groups at 100 yards with them.

I had a mossberg 500 20ga. with the rifled/cantilever barrel it loved the Lightfields

I picked up the tipped Barnes this year on sale for deer season. I took a button buck with one from my tree stand, it shattered the left shoulder, took out the left lung, heart, right lung and cut a 1" swath through 4 ribs on the way out the right side. They group well on the range also. The tipped Barnes are what I use in my ML also.

Sounds like they are a very devestating slug ,what make of gun are you shooting them out of?What kind of groups do you get?

I'm using an 870 with rifled cantilever barrel and a bushnell multi-reticle red-dot. Bench rest at the range, using the 1 MOA dot, I can keep a 2" group at 100 yds. In the field, I use the circle-dot reticle, or the 6 MOA dot, and I know the slug is going inside it, which is good enough for a kill as most shots are still w/in 100 yds.

If I can find some Iam going to give a couple boxes a try aswell as the hornadays.Can't wait to try them.Thanks for the info!