Its my understanding that now there is no OAL restrictions on semi pistol now but there still is on a revolver right? And I know .40 is the min for a pistol so that would make .40 and up, including 45 ACP, now legal in a semi but now a revolver if I understand the regs correctly.
Correct on all that, but you can use .357 Sig in semi, even though it's less than .40. Can't use a moon clip and 10' barrel .45acp in a revolver