I have three Mausers that are chambered to 8MM06. I have heard reloaders on internet reloading forums list the problems with Mausers with long chambers and generous necks; I did not take them seriously because I had other more accurate sources of information.
But, what was it to me? I purchased a 8MM06 reamer, I increased the length of the 8mm57 chamber .127" from the shoulder of the chamber to the case head . At the same time I was reading about bench resters claiming the firing pin drove the case shoulder to the chamber shoulder when it struck the primer. And I said to myself; I have to believe he said it, What I can not believe was all of these reloaders reading this stuff as he made it up and believing him
I understand; it says do not try this at home: (OR AT THE FIRING RANGE) I chambered 8mm57 ammo into one of my 8/06 chambers, I pulled the trigger; the firing pin busted the primer and the case did not take off for the front of the chamber. After the bank I ejected the fired case. What happened to the case when fired is beyond the comprehension of most reloaders; to verify the results I fire a few more rounds of 8mm57 ammo in one of my 8mm/06 chmabers. No fluke, the results was the same and predictable.
If insults could have changed the results I would have had to change the results; no matter how many 8mm57 rounds I fired in the 8mm06 chamber I could not get the shoulder to move, I could not stretch the case between the case head and case body and ever time I fired one the shoulder was erased and became part of the case body. And then there was the neck before firing and after firing; the neck proved the case did not move when fired.
Yes, I have an 8mm06 Mauser, I did not find a down side. I sent most of my 8MM Remington Mag stuff up to Alaska, I kept all of my 200 grain + 8MM bullets for the 8MM06.
F. Guffey