Ceretto is recommending taper hull wads with a straight hull, which is why these show low pressure. The loads rely on an inefficient gas seal.
I would much prefer this load using the correct wad for the hull:
Shotshell
12 Gauge
2 3/4-in. Federal Gold Medal Plastic Target Shells
1 shot wt.
Fed 209A
12S0
Clay Dot 17.9
1200 FPS
5,870 PSI
This is from Alliant, it's tested also.
The discussion of single vs double base is meaningless.
PB and 7625 are long gone.
I'm not having anybody 'reproof' any of my guns. Ever.
Other than that, it's a great article.
