Yup brass type will make a difference. My 178 BTHP/AMAX load was using 45grns of Varget in a Win case but in a Hornady case I only used 44grns for the same velocity.
Also a small drop tube helps. I have used one for years no matter the powder or charge. A short 4" version like this. https://www.midwayusa.com/product/842036/rcbs-quick-change-powder-funnel-kit
Also a small drop tube helps. I have used one for years no matter the powder or charge. A short 4" version like this. https://www.midwayusa.com/product/842036/rcbs-quick-change-powder-funnel-kit