In the past, I have loaded fast 3/4 ouncers in the 12 for Sporting. Went down a choke, and they did okay.
We recently got a FITASC course set, brainchild of our Club President, Frank Bloom (Thank You), and I have started loading for it. One ounce at a little over 1300 fps. Fed GM Paper load is 1 ounce at 1330. BOILS anything at any distance!
The 3/4 oz loads did not do well on outgoing targets. I imagine one would have the same issues with this load on the trap field.