Hi. I am trying to decide on what I want for my AR10 lower to be built at. I would like to make a 6.5CM AR10 for ammo commonality with my 6.5CM bolt gun that I want to build, but I am starting to second guess that strategy.

When I am going to load for my bolt gun, I am guessing that my COAL will be longer for the bolt gun just from the nature of having more space in the magazine, and if those don't fit in a Magpul AR10 mag, then I would have to load two different cartridges anyways.

Is there someone out there that loads for a bolt gun that can also use the same OAL so it fits in an AR10 magazine, but doesn't see that much reduction in their bolt gun usage? Is what I am a valid reason to want two different cartridges for my AR10 and bolt gun, or am I making a mountain out of a mole hill?