Before Red Dot became available again, I sent Tom Armbrust a 1 1/8 oz short ten target load with 19.5 grains of Titegroup/High Gun.
Winchester hull trimmed to 2 7/8"
Cheddite primer
19.5 gr. TiteGroup/High Gun
BP X10X seal
BP 1044 Decimax wad
2 16 ga .125 nitro cards
1 1/8 oz 7.5 lead shot
Six fold crimp
This gave a mean velocity of 1223 fps at a mean pressure of 8520.
I am comfortable shooting this load in my Damascus tens, both of which bear superior proofs, but might reduce the powder by a grain.
Short Ten High Gun test redacted.jpg