If you use the same powders and peak pressures and COL's with the two bullets in QuickLOAD, the 175 grain bullet's velocity is 2-3%% lower in a standard 24" velocity test barrel, depending on the powder. That's not scientific, as I don't know they use the same powder or peak pressure in both rounds, but it gives you a vague idea of the likely difference.
Gunsite Orange Hat Family Member
CMP Certified GSM Master Instructor
NRA Certified Rifle Instructor
NRA Patron Member