I purchased a number of detachable box magazines for Model 70 DBM’s a number of years ago from a gun shop going out of business. These guns were only offered a couple of years in the early to mid 90’s. All are new, some have boxes. I have more than enough for my 300 Magnum. The magazines have a capital letter stamped on one side denoting caliber. Not sure which is which. Message me with needs and I’ll see if I can help you out. Make me an offer!