I revisited this slug simply because the only data I ever used was the first time I loaded these using STS hulls, real WAA12 wads, and 25 grains of Herco. Only moving around 1230-1250 fps, but I got one hole accuracy at 50 yards through my USH.
One thing I’d like to note is I don’t use any filler in the base. I strongly believe it’s unnecessary and the “collapsed skirt” people talk is probably due to base distortion imparted on the skirt upon impact.
Also, every one of my wads were mangled, however accuracy was good. No nitro card were placed under the slug in each load I tested.
1st group:
Lyman 525 Slug
37 grs of longshot
Federal 12S3 wad
2.75” low brass new Fiocchi hull
Fold crimp
Savage 212
50 yards
1490 fps.
5 shot group
2nd group:
Lyman 525 Slug
??? Grs of SR4756 (what ever the Lyman book said. I forgot to label these)
CB clone of WAA12R wad
2.75” low brass new Fiocchi hull
Fold crimp
Savage 212
50 yards
1420 fps.
4 shot group.
Note the keyhole shot.
3rd group:
Lyman 525 Slug
32 grs of 800X
Federal 12S4 wad
2.75” low brass new Fiocchi hull
Fold crimp
Savage 212
50 yards
1430 fps.
5 shot group
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