Hi Sits,
I’ve been loading your proofed 70mm 20ga, 615, z19 plastic wad, 20grain AO, 27g lead fold crimp. It’s a great load.
I’ve also been loading it in fibre with nitro card at 21 grains. Also a lovely load. I’m interested in that 67mm RTO load. Are you using the same 20gr AO 27g lead but with plastic obturator and fibre and RTO? Just bought a GAEP crimp finisher and it makes beautiful RTOs with a cordless drill.