Yes- Kosher salt is a random more natural crystal shape. It's packing factor is not as high as table salts... an equivalent amount is approximately 2x table salt's amount.
Also table salt should not be used in brining, due to it's iodine content. This often leads to a "metallic" taste, and adds ALOT of iodine to the food. Many, myself included- have an iodine sensitivity, to varying degrees.
A good alternative to Kosher has been developed for ease of measurment- canning salt. Use it in equal amounts for table salt.
The sea or "natural" salts are not your best choice for brining, due to the mineral contents. For cooking applications of "salt to taste" they are fine, but their measurments can be tricky as well.