Weight of a shrunk item is approximately its original weight multiplied by 0.00025 (or 1/4000th if you prefer fractions) of the original weight.
Shrink item doesn’t affect the movement of the item, so it would retain the same velocity, it would just be bigger. There is precedent for this in, for example, the reduce person spell, which shrinks a person and all their equipment, but as soon as an item leaves the possession of the shrunken person, it expands to full size (but does not become less accurate or have its range altered in any way).
However that did remind me of one thing. It wouldn’t work with a projectile weapon. With a projectile weapon, it deals damage based on the weapon that fired it. A thrown weapon would deal damage based on its size at impact. Funny little quirk there.
Weight of a shrunk item is approximately its original weight multiplied by 0.00025 (or 1/4000th if you prefer fractions) of the original weight.
Shrink item doesn’t affect the movement of the item, so it would retain the same velocity, it would just be bigger. There is precedent for this in, for example, the reduce person spell, which shrinks a person and all their equipment, but as soon as an item leaves the possession of the shrunken person, it expands to full size (but does not become less accurate or have its range altered in any way).
However that did remind me of one thing. It wouldn’t work with a projectile weapon. With a projectile weapon, it deals damage based on the weapon that fired it. A thrown weapon would deal damage based on its size at impact. Funny little quirk there.