I'm guessing but I can't imagine Browning making any more lengths actions than is absolutely necessary. I have an A-Bolt in .260 and .223 and believe there is a difference in the lengths of those actions. Add to this the long actions and that makes 3, possibly. I'm away from home and will check it when I return. You should be able to contact Browning technical services and get the official word, however.
I don't think this post helped one damn bit but I hated to see you question go without any answers.
