Fired 28GA FH-- Cases extract easy.--It is
in bolt action Enfield. With 550gr jkt slug,
full load 150 gr of WC-860, got 1900 fps.
This will be slowest load and powder.
In picture is 3.25" brass 28ga cases, regular
28ga plastic case, jkt slugs, a 458Win
for comparison.Regular cases work also.Ed