While Adam's answer sounds right to me, I do know that a thrown US penny, at 2.5g and thrown correctly, can draw blood. (I've done so.) And I like slightly more detail.

The 4e coin is 1/50th of a pound (presumably avoirdupois). These compare in weight to the Sacagawea Dollar coins of the US. The coins (at 8.1g) are 56 to the avoirdupois pound (453.59237g)... That is 3.1 times that of a penny. A good arm can get one going pretty fast.

A penny is pretty weak... the 4e coin is fairly massive. I'd say 0+Strength Bonus as damage, but on a crit do 1d3+Str.

While no proficiency is present, I'd suggest one could easily be added. Allow a bonus to hit and increase damage to 1d3+Str, with crit x2. They are aerodynamic, so the range should be about Str feet unskilled and probably about Str/2 5' squares with proficiency.

To hit should be Dex based.

While Adam's answer sounds right to me, I do know that a thrown US penny, 2.5g, thrown correctly, can draw blood. (I've done so.) And I like slightly more detail.

The 4E coin is 1/50th of a pound (presumably avoirdupois) keep in mind that these compare in weight to the Sacajaweh Dollar coins of the US... 8.1g coins are 56 to the 453.59237 g Pound avoirdupois... 3.1x that of a penny. A ghood arm gets one going pretty fast.

A penny is pretty weak... that coin is fairly massive. I'd say 0+Strengh Bonus as damage, but on a crit, do 1d3+SB.

And while no proficiency is present, I'd suggest one could easily be added, allowing a bonus to hit and increasing damage to 1d3+SB, Crit x2. They areaerodynamic, so range shoud be about STR feet unskilled, and probably about STR/2 5' squares with proficiency.

To hit should be Dex based.

While Adam's answer sounds right to me, I do know that a thrown US penny, 2.5g, thrown correctly, can draw blood. (I've done so.) And I like slightly more detail.

The 4E coin is 1/50th of a pound (presumably avoirdupois) keep in mind that these compare in weight to the Sacajaweh Dollar coins of the US... 8.1g coins are 56 to the 453.59237 g Pound avoirdupois... 3.1x that of a penny. A ghood arm gets one going pretty fast.

A penny is pretty weak... that coin is fairly massive. I'd say 0+Strengh Bonus as damage, but on a crit, do 1d3+SB.

And while no proficiency is present, I'd suggest one could easily be added, allowing a bonus to hit and increasing damage to 1d3+SB, Crit x2. They areaerodynamic, so range shoud be about STR feet unskilled, and probably about STR/2 5' squares with proficiency.

To hit should be Dex based.

While Adam's answer sounds right to me, I do know that a thrown US penny, at 2.5g and thrown correctly, can draw blood. (I've done so.) And I like slightly more detail.

The 4e coin is 1/50th of a pound (presumably avoirdupois). These compare in weight to the Sacagawea Dollar coins of the US. The coins (at 8.1g) are 56 to the avoirdupois pound (453.59237g)... That is 3.1 times that of a penny. A good arm can get one going pretty fast.

A penny is pretty weak... the 4e coin is fairly massive. I'd say 0+Strength Bonus as damage, but on a crit do 1d3+Str.

While no proficiency is present, I'd suggest one could easily be added. Allow a bonus to hit and increase damage to 1d3+Str, with crit x2. They are aerodynamic, so the range should be about Str feet unskilled and probably about Str/2 5' squares with proficiency.

To hit should be Dex based.