However , with careful gun design and production , no fundamental reason exists that higher pressures could not be used .
Conversely , no commercialized rimfire has ever been loaded above about 40,000 psi ( 280,000 kPa ) maximum chamber pressure .
With careful gun design and production , no fundamental reason exists that higher pressures could not be used .
Conversely , no commercialized rimfire has ever been loaded above about 40,000 psi ( 280,000 kPa ) maximum chamber pressure .