Many are looking at distant photos of the Vegas venue and Sutherland church and don’t see holes. These images show why.
AR-15 cartridges are larger (holding the powder), but 5.56mm/.223 caliber bullets and bullet holes are tiny, less than 1/4 inch in diameter.

A standard, hexagonal, “#2 pencil” is cut to a hexagonal height of 1⁄4-inch (6 mm), but the outer diameter is slightly larger (about 9⁄32-inch (7 mm)). (source)

Related: PHOTOS: Many Bullet Holes in Sutherland Baptist Church
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…pizza box shot with a .223 bullet [same size as 5.56mm]. …the entry point can be seen on the left and the exit on the right, and a penny is used for reference.

 (source)

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5.56mm round from an AR15 punched a hole through a quarter.
Bullet shown is obviously not the one that went through it.

(source)