Berdan may or may not be corrosive. Boxer may or may not be corrosive. Whether a primer is boxer or berdan depends only upon it's construction. A berdan primer has two small horns that fit into two small holes in the shell case. A boxer primed case has only one hole in the center of the case. Boxer primers are readily reloadable. Berdan primed cases require special tools and are not usually worth the trouble. If you look inside the mouth of the case (and this may require a small flashlight) you will see either a single primer hole (boxer) or two holes offset from the center (berdan). Whether the ammunition is corrosive or not depends upon the explosive material that is used to make the primer and not the type of the primer.
Last time at the range I found about 300 rds of 308. I was thinking of scrounging it until I noticed it was berdan.