I was in a Quebec caribou camp with Layne Simpson several years ago and he was STILL seriously pissed about a misfire on a truly wonderful whitetail the year before.
If I remember correctly, somebody (maybe Remington or Norma) made .308 brass with a small primer pocket and he was getting stellar accuracy with the brass.
THEN, he was hunting whitetail deer one very cold morning and he experienced the worst thing possible for a handloader ... a total misfire ... CLICK!!!
And, of course, the buck ran away, never again to be seen by human eyes.
At a later date, Layne froze some ammo and experienced the same thing at the rifle range. Something about small primers, relatively large cases, freezing temps and dammit misfires.
Frankly, Layne is a very decent handloader, truly an astute hunter and I suspect he was onto something.
Because of this, I would not personally trust a small primer to ignite a 6.5 Creed in a hunting load ... period.
Just my thoughts and thoughts not requested by a living soul.
kd
Id expect a pop n fizz....not a CLICK.
CLICKS only happen when the primer isnt whacked with enough force, the primer is defective or contaminated.
A CLICK is an entirely different ignition problem than a hangfire/pop n fut or wide velocity variation across a chronograph.
Maybe click isnt what happened, but thats what youve stated.