According to Quickload one can expect a bit more Mv when using Vv N550 W/O excess pressure.

I was only able to get about 2750 fps W/175gr Sierras using IMR 4064 while I could get nearly the same Mv out of 200gr Partitions W/Vv N550.

Easy bolt lift, no overly flattened primers & great accuracy.

53.5gr Vv N550 in cases formed from once fired GI '06 brass, 200gr Partition, CCI LR primer, 3.132" COAL. 2730 fps.

(wrong powder charge load data written on target)