I use '15 under 75's. My velociry isn't is fast as some get with 335 but accuracy is better for me in my rifle. In 3 different 223AI's 26.3gr does between 3006 and 3330 depending on which rifle. The chunky ones have 21" barrels and the little one a 20'ish barrel. The spread is almost nothing so I lost interest in trying another powder.
Have no worries of bullet performance on deer. Theyll work rather well for you. The 75amax from 22-250AI and 50gr vmax from 223AI form loads is all we used this year.
