CCI Blazer does run a bit long in OAL. I have measured this with a caliper and know this to be true. Their overall length is not consistent either.
In the majority of guns, this is not an issue. I have seen several finicky 1911s that didnt like it, but did fine with everything else.
I am not saying its junk. I have never had one fail to fire. It just isnt as consistent as other ammo.