Pressure information given to me by RST:

All are 12 bore loads 2.5" case:

Maxi-Lite: 1 oz., 5700 PSI

Falcon Lite: 7/8 oz., 5400 PSI

Ultra Lite: 3/4 oz., 4400 PSI

If you have concerns about RST's other loads and pressure, just email them, they will be quick to respond.

The above are all effective loads, so why worry about 2.75" shells and pressure?

The folks at RST are great, lets give them as much business as possible!