A sleeved gun is not a monobloc gun. A monobloc gun is not a sleeved gun.
They are different.
The mini shells are not 2”, and this marks the first time I have seen 2” ammunition, an obscure English 12 gauge loading, not of commercial significance, confused with the 1 3/4”tactical mini shells
As has been pointed out already, the Federal 1 3/4” loads are not loaded as low pressure ammunition, and I highly doubt that batch-to-batch testing of same would yield consistent pressure levels of 9500psi. They would likely float between 9500psi and SAAMI max. It is unrealistic to expect that ammunition produced with globally sourced components will have consistent lot-to-lot pressure values. You have one fact when dealing with commercial consumer shotgun ammunition loaded for the US market-it will be loaded at or below SAAMI max. If it isn’t stated on the product, you can assume SAAMI max.
Best,
Ted
