All I'm saying from the start is there is really no need for a 175 gr BH unless your plan on taking on cape buffalo or elephant. Which reminds me. My 420 gr arrow which included a 100 gr BH (Magnus Stinger) completely passed through both bison I shot. The last one, a huge bull, after the hit turned a complete 360 and went 15 maybe 20 yards before going down. Use whatever you decide. But my opinion is that much weight is not needed.
And for the average Joe who doesn't have the cash flow to always buy new arrows has, as an example is shooting 60# and a 28" shaft (say gold tip) shooting a 100 gr head the chart recommendation is for a 400 spine. ( IMO a 340 would be better). Now if he should put a 175 gr head on there which the chart doesn't even show he would have to lower his poundage down as far as the bow could go because the chart recommends a draw wt in the mid to high 40s.