I couldn’t find the answer to this question anywhere else, so hopefully someone can help. I have travelled to Africa several times with my Blaser R8, but with only one barrel. On my form 4457 I just listed the rifle, caliber and only the serial number on the stock/receiver. My question - how do I fill out the 4457 when I want to take one R8 stock but two barrels? Do I just list the barrels and calibers under the same serial number, add both the barrel serial numbers, or something else? Looking for Your guys real world experience! Thanks, Birdy