has anyone seen marks on spent brass like this? http://i7.photobucket.com/albums/y278/flytyercurt/DSC00457.jpgthey seem to all have the same mark, some actually have a burr. I noticed this when picking up spent brass from my brother's new bushmaster last night. also it seems to only eject the cases about 3 or 4 ft, where my stag sends the spent cases 10 to 12 ft. could it be a bolt carrier problem? should he worry about it? or do you think some break in will resolve this? thanks in advance...

Do you mean the firing pin marks...?






J/K it looks like the rounds are loaded a little hot or there might be a little problem with the head spacing?
The reloading forum would be the place to ask.