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Indoor 300 on the line: 12 ends, 5-spot, and what an X is for
Most US clubs mean the same thing when they say indoor 300: 12 ends of 5 arrows, usually at 20 yards, max 300. You shoot five, you score five, you shoot five more. That pause is the whole round.
The numbers
Each arrow is 0, 1, 2, 3, 4, 5, or X. Five is the high ring. X is the smaller ring inside it. An X still counts as 5 points. The X-count is the tiebreaker when two people shoot the same total.
If you mark 5 when it was an X, the 300 does not change and the tiebreaker does. If you mark Vegas numbers (8, 9, 10) on a 5-spot, you are on the wrong card. That format is Indoor Vegas 450.
How I actually score it here
Start an Indoor 300 from Home. Shoot the end. Tap a score for each of the five arrows — including misses as 0. Lock the end. End 2 opens. Repeat through 12. You cannot go back and “remember” a line-cutter after you have already shot the next end.
Photos are optional when it is just you. On a club tournament or league they are required. I wrote the full walk-through in the Indoor 300 scoring guide.
A boring but useful habit
Call arrows with a partner the same way you always have: “5, X, 4, 5, 3.” Then tap what you called. Do not tap while the line is still hot and you are guessing from the shooting line. The site will wait. The paper will not get clearer if you rush it.