Nuts that don't cause bowel problems

I've stopped eating nuts and my bowel movements are much better. I've had problems with nuts from Basic Foods, the local co-op, and Price Chopper. One bag will be good, and the next bag I eat will be bad. I eat a lot of fiber, but I don't think excessive fiber is the problem. Nuts are the most expensive food I eat. I hate wasting money on them.

Are you getting the nuts in the bulk bins at these stores or they prepackaged?