Round count is 4+ shotgun
Shooter stages his/her long guns and realizes they only have five feather lite shells in their belt. The shooter turns to the TO and takes 4 feather lite shells from the TO's belt and positions the shells in the first four loops of their shotgun belt. Shooter declares "Ready" and away they go. During the stage the shooter uses the four borrowed shells. After the stage the shooter gives the TO back 4 feather lite shells.
Under the following definition of "the line", the shooter has until "the BEEP" to rectify any PRE-STAGE errors, including failure to have enough proper ammo with which to engage the stage (something the T/O is supposed to look for when performing SHOOTER INVENTORY before the stage begins (REF RO1 V. 21.6 p.3) re ways to assist the shooter.)
... this would include SG ammo (as well as revolvers left on the LT).
Stage aka “the line” – synonymous with “Course of Fire” from the beep