Gentlemen,
I recently purchased a 12 ga Parker PH with 2 5/8" chambers and twist barrels. I had the gun checked out and it was deemed safe to shoot with low pressure loads. I went on to the alliant powder website and got the following load. 2 3/4" Remington STS hulls, 1 oz shot, rem 209P primer, WAA12L shot cup and 18 grns of Green Dot. The operating pressure of this load is supposed to be approximately 6300 PSI.
What I did to achieve the shorter shell length was cut down the OAL of the hull to 2.5" and then loaded it on my MEC 600 as normal but added an overshot card under the crimp to keep the shot from falling out. Below is a pricture.
Any opinions on the load and what do you think about the technique of adding the overshot card under the crimp? Will it increase pressure?