ISWC Rules

Last updated: 1/7/2008

The Interkingdom Siege Weapon Challenge (hereafter called the Challenge) is a contest designed to challenge the prowess of siege engineers across the SCA and to allow them to compare their results to one another through a consistent set of rules.

The Challenge shall begin on January 1st and end December 31st.


All siege engines and ammunitions are to comply with SCA and Kingdom rules for armored combat use.

Direct Fire

Type A - May fire one large siege projectile, or up to five small siege projectiles.
Type B - May fire one small siege projectile.

Indirect Fire

Type A - May fire one large siege projectile, or up to five small siege projectiles.
Type B - May fire one small siege projectile.

Note: The use of Small Arms is not currently supported in the ISWC. Only siege projectiles are to be used.

Distances and Ends

The distances of 30, 45, 60 and 75 yards are the course, with the back of the ground square placed at each distance.

The engineer shall shoot from the same engine 5 discharges per distance, for a total 20 shots. Type A engines may freely select from one large or multiple small munitions per discharge to the next.

Target and Scoring

An 8 ft by 8 ft square on the ground with a 2 ft x 4 ft vertical (as close to straight up and down as feasible) target placed at the back of the square. The bottom of the vertical target shall be placed flush with the ground, positioned in the middle of the back line.

The back line of the target ground box is to be placed at each distance (30, 45, 60 75 yards).

For Type A engines firing multiple small siege projectiles, hits into the ground square shall score 1 point each, and hits to the vertical target shall score 2 points each. When firing one large siege projectile, a hit in the box is 5 points and a hit on the vertical target is 10 points.

For Type B engines, a hit to the ground square shall count as 5 points, and a hit to the vertical target shall count as 10 points.

If a shot appears to hit the ground and at the base of the vertical target at the same time, it shall score as a hit on the vertical target.

If a shot hits the line defining the box on the ground, then it shall count as a hit IN the box.

A scoring shot shall only count once where it first strikes the target.

Conducting the Challenge

A qualified marshal shall inspect the siege engine and ammo for compliance with SCA and local Kingdom laws.

The engineer may practice at each distance before shooting for score, limited only by time and other requirements by the marshal of the line.

Before shooting for score at each distance, the engineer shall inform the marshal of line of this intent.

The engineer may shoot for score the distances in any order or as per the marshal of the line's requirements.

An armored spotter may be placed down range to verify scoring shots. The armored spotter shall be inspected by a qualified marshal for compliance with SCA and local kingdom laws. The armored spotter does not have to be a marshal.

The Challenge score may be conducted at an event or practice.

The engineer may participate in more than one scoring attempt per siege weapon category per day (per marshal allowance), but only the highest score achieved per category will count towards displayed rankings.

Submitting Scores

All scores shall be submitted to the keeper of The Challenge.

Scores may be submitted by e-mail to or by postal mail to 119 Sheryl St., Hurley, NY 12443.

Score submissions shall contain all required scoring information, or the score may be rejected until the missing information is filled in.

Score submissions will be accepted up to two weeks after the closing day of the Challenge.

The following information shall be submitted for engines the first time they have a score submitted for them:

The following information shall be submitted for all scores:

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