1stmarine
Member
This comprehensive analysis by Zak Smith will help you understand these calibers...
http://demigodllc.com/articles/6.5-shootout-260-6.5x47-6.5-creedmoor/
http://demigodllc.com/articles/6.5-shootout-260-6.5x47-6.5-creedmoor/
The 6.5 Creedmoor is a shorter cartridge than the .260. So I'm assuming his point is that you could load bullets with a longer OAL, and still fit in a magazine sized for the .308 family of cartridges. That might be an advantage when handloading the longer bullets, and playing with whether they like a jamb, or a jump, to the lands.
Not to put words in his mouth....but that is what I think he was meaning.
There is no COAL restriction for the 260. It works fine with the typical magazines and the best bullets available.
that is why I posted this very nice review from Zak, founder of this forum... http://demigodllc.com/articles/6.5-shootout-260-6.5x47-6.5-creedmoor/
Also the 260 has a smoother angle on the shoulder that is great news for autoloading firearms an in line with military service cartridges following
the same dimensions directives (ie: 5.45x39, 5.56/223R, 7.62x51/308W, 338LM). This is huge for a cartridge to have a chance to be considered
for service use.
What Bart is saying about out-of-square case heads is worth paying attention to. If you want to be pickey it applies to new brass as well. Back in the '80's or therebouts several high-power shooters, myself included, carried it to the n'th degree and even turned the heads on new brass enough to level off the high spots. A guy I occasionally shot with by the name of Clayton Audette was a big experimenter and tinkerer and gave me a gadget he made for measuring head squareness and other dimensions. After a couple years I decided turning heads wasn't worth the bother and gave it up but still have some turned head ammo left over from Perry years ago, as shown in attached photo. Here's also photos Audett's case measuring gadget, with shot of it rigged for measuring head squareness.Lots of military team members gave their match brass to civilians; they paid for it in taxes. I always cautioned those getting mine that they were not all that great for competition but good for other stuff. None of the military semiauto match conditioned rifles had their bolt faces squared up with chamber axes. Those case's heads were flattened out of square and if reloaded, would string shots in the 1 to 7 o'clock axis right angles to the bolt locking lug in-battery axis. Stringing typically added 1/3 to 2/3 MOA to groups new cases produced. New case heads are typically quite square to their long axis.
Why not?Original SAAMI dimensions and reamers are less than ideal for this kind of use
Bart,Why not?