Dayganistan wrote:On a moderately related topic, about how long would it take a military to transition it's 7.62 NATO firearms to 6.5 Creedmoor? I'd assume most 7.62 NATO weapons would be a relatively easy conversion and it wouldn't necessitate buying new firearms.
It would depend on the finances and the gun design; in theory it's just a bolt and barrel change, and the bolt doesn't need to be changed much, in practice replacing the barrel in some guns is as about as difficult as rebuilding a whole new gun from scratch, so it may be worth it just to replace your old firearms completely, which would be more expensive. Switching from 7.62mm NATO to 6.5mm Creedmoor depends a lot on numbers, your nation's finances, the end goal and so on and so forth.
But in theory replacing infantry weapon's is not very expensive. The entirety of the 8 million M16's produced for military purposes, not all of which went to the U.S., with inflation, is at most like 12 billion dollars, which given the size of most military budget's, is not much. To outfit a million soldiers with new 6.5mm rifles would be like 1-2 billion dollars, with the only issue being mass produced ammunition and/or using up old stockpiles, such as on older vehicles, with the U.S. military using .30-06 machine guns on their tanks well in to Vietnam for this reason. So, if it's just for infantry (and to slowly phase out emplaced machine guns as well), it wouldn't be very expensive or hard to do, especially if you are basically buying a new gun that is slightly different from the old one, the manual of arms is the same, there is a high degree of compatibility of parts and training and so on. Basically, replacing old infantry weapons is not very expensive, and if they are similiar to your old one's, it's even easier to do. But the basic gist of it is to expect to need to buy whole new guns, as the compatibility makes the logistics of it far easier, and some guns will be able to convert between the two rounds, but given the difficult likely will require whole new guns. Machine guns would be the best thing to convert to a new caliber, as it's basically just a barrel change, and most machine guns have very expensive receivers (6000+ dollars) and quick-detachable barrels anyways, making the switch rather easy. Some machine guns are in the 10'so of thousands of dollars, with a new barrel only being a few hundred, so it may make sense to swap out the barrels on machine guns and just buy whole new rifles. Barrels are often half the price of rifles or more, so a replaceable barrel sounds great first, until you realize it may just be better to buy a whole new gun from scratch, especially since it's very difficult to replace barrels on many guns.