Manuals
The instructions that comes with the Load All are good. Unless you're buying a brand new (as in made in the last year or so) throw away the load tables that comes with the load as they will be out of date.
Lyman's is a good one to start with. Check to see if it's the Fifth Edition which is supposed to be out.
www.reloadnrma.org is also a good place to start. Lots of links to manufacturer's websites form which you can down load recipes, some wad manufacturers have recipes on theirs websites. Follow the recipes exactly as a shotgun operates at handgrenade pressure only a couple of inches from you face. The only allowable substitutions are with "Replacement" wads. Replacement wads are ones like Claybuster, Nothing But Dust; aka Duster , and Downrange. They specify both on their websites and their packaging "USE XXXXXXXX data for this wad." For example, I use Green Duster wads in my 1 oz tap loads. They are a replacement/use the same data as WAA12SL wads, are cheaper and leave a lot less plastic in the barrel then Claybuster or Winchester wads.
Here's what I got for 1oz loads using Clays powder from Hodgdon's site:
Shell: 2 3/4" REMINGTON STS, OR NITRO 27, OR GUN CLUB PLASTIC SHELLS
Load Type Gauge SW Order Shot Wt. Powder Primer Wad Powder Wt. (Gr.) Pressure Vel. (ft/s)
Lead Shot 12 1 1 oz. Clays CCI 209 Purple PC 17.1 6,400 LUP 1125
Lead Shot 12 1 1 oz. Clays CCI 209 Purple PC 18.3 7,100 LUP 1180
Lead Shot 12 1 1 oz. Clays CCI 209 Purple PC 19.5 7,700 LUP 1235
Lead Shot 12 1 1 oz. Clays CCI 209 Purple PC 20.7 8,400 LUP 1290
Lead Shot 12 1 1 oz. Clays CCI 209 Rem. TGT 12 15.4 8,700 PSI 1125
Lead Shot 12 1 1 oz. Clays CCI 209 Rem. TGT 12 16.6 9,600 PSI 1180
Lead Shot 12 1 1 oz. Clays CCI 209 Rem. TGT 12 18.2 11,400 PSI 1235
Lead Shot 12 1 1 oz. Clays CCI 209 WAA12SL 15.1 8,500 PSI 1125
Lead Shot 12 1 1 oz. Clays CCI 209 WAA12SL 16.3 10,100 PSI 1180
Lead Shot 12 1 1 oz. Clays CCI 209 WAA12SL 17.5 11,200 PSI 1235
Lead Shot 12 1 1 oz. Clays CCI 209SC Purple PC 16 7,800 PSI 1125
Lead Shot 12 1 1 oz. Clays CCI 209SC Purple PC 16.8 8,800 PSI 1180
Lead Shot 12 1 1 oz. Clays CCI 209SC Purple PC 18.3 10,900 PSI 1235
Lead Shot 12 1 1 oz. Clays CCI 209SC Rem. TGT 12 15.7 6,900 LUP 1125
Lead Shot 12 1 1 oz. Clays CCI 209SC Rem. TGT 12 17.8 8,100 LUP 1180
Lead Shot 12 1 1 oz. Clays CCI 209SC Rem. TGT 12 18.8 9,900 LUP 1235
Lead Shot 12 1 1 oz. Clays CCI 209SC Rem. TGT 12 20.5 11,100 LUP 1290
Lead Shot 12 1 1 oz. Clays CCI 209SC WAA12SL 15.8 8,300 PSI 1125
Lead Shot 12 1 1 oz. Clays CCI 209SC WAA12SL 16.6 10,000 PSI 1180
Lead Shot 12 1 1 oz. Clays CCI 209SC WAA12SL 17.4 11,300 PSI 1235
Lead Shot 12 1 1 oz. Clays Fed. 209A Purple PC 16 7,900 PSI 1125
Lead Shot 12 1 1 oz. Clays Fed. 209A Purple PC 17 9,100 PSI 1180
Lead Shot 12 1 1 oz. Clays Fed. 209A Purple PC 18.5 10,300 PSI 1235
Lead Shot 12 1 1 oz. Clays Fed. 209A Rem. TGT 12 15.6 8,400 PSI 1125
Lead Shot 12 1 1 oz. Clays Fed. 209A Rem. TGT 12 16.7 9,900 PSI 1180
Lead Shot 12 1 1 oz. Clays Fed. 209A Rem. TGT 12 18 11,500 PSI 1235
Lead Shot 12 1 1 oz. Clays Fed. 209A WAA12SL 15.6 9,200 PSI 1125
Lead Shot 12 1 1 oz. Clays Fed. 209A WAA12SL 16.5 10,800 PSI 1180
Lead Shot 12 1 1 oz. Clays Fed. 209A WAA12SL 17.7 11,300 PSI 1235
Lead Shot 12 1 1 oz. Clays Fio. 616 WAA12SL 15.5 8,800 PSI 1125
Lead Shot 12 1 1 oz. Clays Fio. 616 WAA12SL 17 9,000 PSI 1180
Lead Shot 12 1 1 oz. Clays Fio. 616 WAA12SL 18.3 10,500 PSI 1235
Lead Shot 12 1 1 oz. Clays Rem. 209P CB-4100-12 16.7 5,800 PSI 1125
Lead Shot 12 1 1 oz. Clays Rem. 209P CB-4100-12 18 7,200 PSI 1180
Lead Shot 12 1 1 oz. Clays Rem. 209P CB-4100-12 19.2 8,500 PSI 1235
Lead Shot 12 1 1 oz. Clays Rem. 209P CB-4100-12 20.4 9,800 PSI 1290
Lead Shot 12 1 1 oz. Clays Rem. 209P Purple PC 16.6 6,100 PSI 1125
Lead Shot 12 1 1 oz. Clays Rem. 209P Purple PC 17.8 7,400 PSI 1180
Lead Shot 12 1 1 oz. Clays Rem. 209P Purple PC 19.1 8,800 PSI 1235
Lead Shot 12 1 1 oz. Clays Rem. 209P Purple PC 20.3 10,100 PSI 1290
Lead Shot 12 1 1 oz. Clays Rem. 209P Rem. TGT 12 16.8 6,600 LUP 1125
Lead Shot 12 1 1 oz. Clays Rem. 209P Rem. TGT 12 17.9 7,400 LUP 1180
Lead Shot 12 1 1 oz. Clays Rem. 209P Rem. TGT 12 18.9 8,100 LUP 1235
Lead Shot 12 1 1 oz. Clays Rem. 209P Rem. TGT 12 19.9 8,800 LUP 1290
Lead Shot 12 1 1 oz. Clays Rem. 209P WAA12SL 16.4 6,700 PSI 1125
Lead Shot 12 1 1 oz. Clays Rem. 209P WAA12SL 17.6 8,100 PSI 1180
Lead Shot 12 1 1 oz. Clays Rem. 209P WAA12SL 18.7 9,400 PSI 1235
Lead Shot 12 1 1 oz. Clays Rem. 209P WAA12SL 19.9 10,900 PSI 1290
Lead Shot 12 1 1 oz. Clays Win. 209 CB-4100-12 16.5 5,800 PSI 1125
Lead Shot 12 1 1 oz. Clays Win. 209 CB-4100-12 17.8 7,200 PSI 1180
Lead Shot 12 1 1 oz. Clays Win. 209 CB-4100-12 19.1 8,600 PSI 1235
Lead Shot 12 1 1 oz. Clays Win. 209 CB-4100-12 20.4 10,000 PSI 1290
Lead Shot 12 1 1 oz. Clays Win. 209 Purple PC 16.8 5,700 PSI 1125
Lead Shot 12 1 1 oz. Clays Win. 209 Purple PC 18.1 7,000 PSI 1180
Lead Shot 12 1 1 oz. Clays Win. 209 Purple PC 19.4 8,300 PSI 1235
Lead Shot 12 1 1 oz. Clays Win. 209 Purple PC 20.6 9,500 PSI 1290
Lead Shot 12 1 1 oz. Clays Win. 209 Rem. TGT 12 16.3 6,500 PSI 1125
Lead Shot 12 1 1 oz. Clays Win. 209 Rem. TGT 12 17.6 7,900 PSI 1180
Lead Shot 12 1 1 oz. Clays Win. 209 Rem. TGT 12 18.8 9,200 PSI 1235
Lead Shot 12 1 1 oz. Clays Win. 209 Rem. TGT 12 20.1 10,500 PSI 1290
Lead Shot 12 1 1 oz. Clays Win. 209 WAA12SL 15.7 7,100 LUP 1125
Lead Shot 12 1 1 oz. Clays Win. 209 WAA12SL 17 8,200 LUP 1180
Lead Shot 12 1 1 oz. Clays Win. 209 WAA12SL 18.4 9,500 LUP 1235
Lead Shot 12 1 1 oz. Clays Win. 209 WAA12SL 19.8 10,700 LUP 1290
Lead Shot 12 1 1 oz. Clays Win. 209 Windjammer 17.3 5,500 PSI 1125
Lead Shot 12 1 1 oz. Clays Win. 209 Windjammer 18.4 7,100 PSI 1180
Lead Shot 12 1 1 oz. Clays Win. 209 Windjammer 19.5 8,600 PSI 1235
Lead Shot 12 1 1 oz. Clays Win. 209 Windjammer 20.6