striper,
The problem with loading down Longshot is the lack of chamber pressure to get a sufficient burn of the powder load.
That being said, you can load down Longshot to about 28 grains in a tapered hull (Remington/Winchester) and 28.5 in a straight hull and get consistant loads with a 1 1/8 oz of shot. You can lighten the powder load a bit more if you use a heavier load (1 3/16 oz or more). This additional payload will create sufficient enough pressure for a consistant burn.
My pet 1 1/8 oz load for Longshot is:
Remington hull
28.5 grains of Longshot
Downrange Versalite or Remington Fig 8 wad. (I like both for this load) Stay away from the cheaper substitutes as they don't deal with the speed very well.
Winchester 209 primer. In the warmer months you can use a Remington 209 to soften the "bite" a little, but seems to be a little cool for sub 50 degree temps. Speed chronos nearly the same, at 1350fps, using both primers.
1 1/8 oz of your favorite shot.
This load crimps up very nice and is way down on the pressure curve.
I find it to be a very managable load to shoot and using 6's really drops them crows out at distance.
BTW this load is great for back-ups when game shooting.
ec90t