Some guns, even smoothbores shot the Forsters much better than that, however there were usually, in a 5 shot group, 1 to 3 flyers - sometimes as much as 5" or 6" out side a nice cluster.

I've hear the factory rifled shotugns don't like the Fosters, which is fine.

My only 'slug' shooting from a rifled Mossberg 835, has been with some .710" RB's, held central to the bore with cut-dwon steel shot wads. This gun has a .714" bore, with .724" groove diameter. I didn't measure it, but suspect it's the standard 36" twist.

Although short for it's 3 1/2" chamber, I used 2 3/4" Fed Hulls, with SR4756 powder and a single 1/2" fibre wad IIRC right now - got it written down somewhere. I didn't chrono it, but wanted to test the poi with faccory set-up sights. They hit right on the bead at 25 yards, 5 shots, fairly rapid fire - group of 2" offhand - Surprisingly, they felt and appeared to be about max. I suspect the velocity is in the 1,700fps range for a hardened ball that's over 500gr.

I am sure David will achieve 2" to 2 1/2" at 50 yards with iron sights from his double.

Just think, what a wonderful gun to pack and with which to kill something big and hairy. Gives me goosebumps & gets me all giggly just imagining it - oh yeah! Sometimes I forget I'm 61.

Friend of mine bummed some hardened .684" balls from me. He then loaded his 1 1/4oz. lead shot duck load powder charge, of something like 24.0gr. of SR7625 (faster than 4756) a hard card, then fibre wad and the round ball patched in teeshirt material, as-if a muzzleloaded ball. I told him to make sure he could push the patched ball out his choke. He claimed 3" at 50 yards from his full choked Win. duck gun.

In testing his round ball loads, he fired two successive shots at a 45 Imperial gallon (50 or 55 US)fuel/oil drum. The first shot was a WW factroy Foster slug of 1oz., which made a shiny lead-covered dent, barely cracking the drum with a bit of lead extruding through the crack. The fairly low velocity round ball (maybe 1,250fps- maybe 1,300fps) punched through both sides of the drum and exited. He figured it would do for a moose while duck hunting - he was right.