Wal-Mart
I found some 11" X 28" poster board that has a 1/2" grid marked on it.
Bought 2 packs of (I think) 12 sheets each for less than $3 apiece.
Took it to work and cut it in half in the big paper cutter.
Now I have 24 11" X 14" target sheets already marked with the 1/2" grid.
Stick a target spot on'em and I can forget bringing my tape measure to the range
I found some 11" X 28" poster board that has a 1/2" grid marked on it.
Bought 2 packs of (I think) 12 sheets each for less than $3 apiece.
Took it to work and cut it in half in the big paper cutter.
Now I have 24 11" X 14" target sheets already marked with the 1/2" grid.
Stick a target spot on'em and I can forget bringing my tape measure to the range