H335 is absolutely not "extremely temp sensitive" in the 223. Nor is TAC magical, Nor are "insensitive" powders a universal thing.
Nope, TAC aint magical, but its damn good for a lot of applications. H335 has proven, and quickly to be temp sensitive in the four rifles ( 2 plain vanilla 223s and 2 .223AIs...) that I have tried it in. Middle of the road loads...I can guarantee a blown primer in the first 7 shots...due to the gun warming up. On a 90 degree day I can virtually guarantee a blown primer on the first shot....and this in rifles you plan on putting100s of rounds through on a given day on PDs...
As they say Your Mileage May Vary, but in my rifles, where I live and how I shoot, it is unusable.
That said, lots of guys here use H335 religiously and experience no problems. Guess Im just the lucky one...
I have heard good things about cfe223...
