Am considering a .450 Marlin bolt gun. Wondering if anybody has heard of this being done? .458 Winchester is close to 45-90 dimensions, I believe the .450 Marlin would be more suitable for my uses as it is closer to 45-70 length. Will have to check, but it seems like it just might cycle through a short action with a magnum bolt face and magazine. - A WSM gun might convert well, for example. I guess a good way to check would be to see if the Browning BLR in .450 Marlin is a long or short action gun. Edit: The .450 Marlin case is 2.1 inches long. - Definitely suitable for a short action rifle.