Heck...now ya'll mention that H335 is temp sensitive. I've just finished a lengthy 223 workup with H335 behind 40 gr Nosler Ballistic Tips. I'll have to check how it shoots when the weather cools down in the Fall. If there's a grouping change, I'll just tape the extra ammo to my chest to keep it at 98.6 or so. Hmmm, but that won't help the first shot from the cold barrel.