I am testing some bullets in a Weatherby Vanguard 223. 22" bull barrel, 1/12 twist.
I have shot 10 loads for each bullet and have not seen any signs of excessive pressure. Here's what I have so far. I will save accuracy comments until I have my new trigger and I'm not sitting next to a 300 win mag with a muzzle brake.
Primer: CCI small rifle mag
bullets: 40gr v max moly & 36gr varmint grenade
26 grains of benchmark, 40 gr v max average 3470 fps
28 grains of benchmark, 40 gr v max average 3642 fps
28 grains of benchmark, 36 gr varmint grenade average 3719 fps
I am also trying to get my hands on some Vhitavouri 120 or 130 to test as well. "It shines like a diamond in a goats *****" , so I am told.
I know 10 isn't alot to base an average off but interesting none the less. And all I could shoot in time to be home for the UFC fight Saturday.