I've been reloading .38, .357, .45 Colt cannelured cases, nickel and brass, on a regular basis over 40 years. I never once had a case failure attributable to a cannelure.
In this case, brass exceeding 1.305" should be trimmed to 1.295". Keeping brass segregated by lots will help with keeping track of how many times each has been fired. You'll have to decide for yourself whether one case out of 50 exceeding 1.305" merits trimming the whole lot or not. For .44-40 brass, ike the fellow above said, use a Lee Factory Crimp die and just never worry about it.
I agree on both points. CCH is definitely a beautiful thing, but those are a bit much. Reminds me of tie dyed t-shirt. And those grips are, well, awful.