You are right ,you would not ..clarification in order.. I keep one in the tube and do a tactical reload. Was taught both methods, prefer slingshot...
Sling shot..but best to keep a round in the tube. Just got to remember the count prior to mag exchange.
.45 ACP for PD/CQ (of course)
.223/.308 for UA/CQB rifle
. 300 win mag for LR
50 BMG for FLR