The 20 Kimber mags are 8-rnd Wilson Combat. And my '96 Colt Trooper MK III .357 mag is just a 6-shoter. Wish I'd bought some original speedloaders for it, as it takes a special unit.
I'm going to try HKS and see if they have any.
Per this caller, my G27 is .40cal but I can drop a .357 Sig and a 9mm barrel in it and it works flawlessly.
Pretty sure I posted that before but Tom forgot to tell that caller he has 3 guns in one.