In a Remington and in a Weatherby S2, 57.5 IMR 4350 shot under an inch with 165/168’s. I have not worked with H4350 yet. As others stated, I would do a test of seating them in, working back with H4350 before I gave up.
I tried R19 and R22. R19 worked better with the 168 Barnes.
In the Remington with R22, I had very good accuracy with both 165-180’s but with the 22” barrel, I found that the 165’s shot best with 61 grains. It seemed to plateau there.
With the Weatherby and the barrel being 2” longer, it picked up some velocity, as the little bit of barrel seemed to help and I could go up to 62 grains with the 165's.
With the 180 Part, 61 grains with R22 was my load.
I tried R19 and R22. R19 worked better with the 168 Barnes.
In the Remington with R22, I had very good accuracy with both 165-180’s but with the 22” barrel, I found that the 165’s shot best with 61 grains. It seemed to plateau there.
With the Weatherby and the barrel being 2” longer, it picked up some velocity, as the little bit of barrel seemed to help and I could go up to 62 grains with the 165's.
With the 180 Part, 61 grains with R22 was my load.