I dont say much on here, as I'm new to bowhunting & still have a lot to learn.
That said, last fall was my first season bowhunting & I got a couple does which put meat in my freezer but when the buck came out for me, I hit him forward in the shoulder & that stopped my arrow dead. Looked to go in about 4" max. I cant say for sure because I never found the arrow or deer. I tracked him the next morning for 1/2 mile or so till the blood quit. I shot anuther that was looking right at me & that one didnt penetrate either. I know that was a bad shot & I probubly shouldnt have taken it but my point is bones can stop arrows sometimes.
I was using an older Bear Paw compound set at 70 lbs & shooting 28.5" xx75 2413 shafts with 100 grain Thunderheads. Cant say how fast they were going but they passed thru 2 other deer & kept going.