What spark plugs?

I would go at least 1 step colder, if you look close, at least from what i see, those plugs are "glazeing", thats normally from rappid excell. & too hot a plug, remember this, a plugs heat range is based on how fast it transfer heat "away" from it, not the opposite, another strong indication is the amount of the plugs strap is clean, notice how far down "too the threads" is clean, it should be right in the middle. Plugs too hot!! My 2 cents