300 Win 150 GMX what is the best powder?

[FjallJager]

My groups aren't bad, I am shooting them out of a Nucleus with a 28 inch proof barrel 1-9.4 twist.

Charge is 82 gr of H1000 seated as long as the case/chamber will allow.

Messed with seating depth, looking for a powder that might work better.

Is N570 better?

 

[Aimsmall55]

My groups aren't bad, I am shooting them out of a Nucleus with a 28 inch proof barrel 1-9.4 twist.

Charge is 82 gr of H1000 seated as long as the case/chamber will allow.

Messed with seating depth, looking for a powder that might work better.

Is N570 better?

I’m not sure about 150’s but I shoot IMR4350 with the 178’s and they shoot REALLY well. About 3050 fps too