maybe you want to claim that we can't GET 2200 fps in ccw autopistols? it's rather easy, actually, with rds like the 357 Sig, 10mm, 9x23 Winchester. It's just a matter of a light enough bullet, with a BIG hollowbase, of the right material and size to build ENOUGH pressure in the barrel, and thus, get that much velocity. The mass producers want to make MILLIONS of $, so they refuse to use the methods that really work to achieve such velocities. With an automatic screw machine, however, hollowbasing and hollowpointing of hard-cast, solidtin bullets can be speeded up to make it feasible to sell them for $1 each,if you aint greedy.
The slow part is beating open the sprue plate on the mold. Tin is HARD, and once it cools enough to open the mold, man,it takes LOTS of serious whacks of the big rawhide mallet to shear off the sprues.