20 Gauge Wads for lower pressures
 

For my Parker 20 gauge target shooting, I use Win 572=14.5 grains, Remington STS hull 2 3/4 in, Ched 209(2000) primer, and a Claybuster CB1078-20(WAA 20) with a 7/8 oz lead load. The velocity is about 1120 fps with a pressure of about 9200 psi.
I what to reduce the pressure to below 9000 psi. Remington RXP20 and Down Range DRV 20 wads are no longer available.
What I am looking for is a wad that will result in a lower pressure.

Richard

Without looking up the specifics on Win 572 may I sugggest finding some CB 1075-20 wads and loading 3/4oz shot. You'll get a slight increase in velocity, a decrease in pressure and you won't notice a difference in performance other than less recoil. But your Parker should be able to handle your current load with no problem. Wads have little effect on pressure.

I reload Winchester 572 for my 20 gauge loads. These are the loads I use. All taken off the Hodgdon Reloding Data Center and the first load Sent to Precision for testing by me.

16.8 Grns Winchester 573 Powder
7/8 Oz shot
Federal Top Gun Hulls
Remington STS 209 Primers
CB 1075 20 Gauge Wads
1199 velocity
7233 PSI.

The original Hodgdon load called for CB-1078 20 gauge wads, but the crimping was terrible, very hollowed out if you will. It was suggested I substitute that wad for the CB-1075 Wad and they crimp very nice. I sent this load to Precision before I shot it and the above are the tested result.

My other go to Winchester 572 load is as follows, and was taken off the Hodgdon Reloading Data Center. Not tested by Precision.

15.5 Grns Winchester 572 Powder
7/8 oz lead
Win 209 primer
CB 1078 Wad
Winchester AA Hulls
1150 Velocity
8100 PSI

Daryl, thank you , I will look into this>Richard

Stephen, thank you, I never thought about change the wad to 3/4
oz and loading 7/8 oz, Richard

One caveat about 3/4 oz 20 gauge loads: a buddy shoots these almost exclusively and has found that lite 20 gauge loads will not always reset an inertia trigger. 7/8 oz no problem so he only shoots 3/4 oz in a DT gun

I'd be curious to what his loads are. I shoot my 3/4oz 20ga loads in a Perazzi, a Browning and an 1100 and they function fine. They are 1200/7500psi using either 20/28 or Unique.

Daryl, he uses 20/28 but I don’t know the weight of the load. The load functions erratically in a Perazzi and a Famars. He sent the Famars to G&H to adjust the inertia block but they wouldn’t do it

I've never had a problem with the Perazzi or the Browning but he also may have the problem by the way he holds the gun. Meaning he doesn't hold it firmly enough against his shoulder or loosely in his hands. I also shoot a 1200fps,3/4oz load in my MX2000 12ga Perazzi and it trips the transfer block.