Actually I agree that the 327 is right on the fence for being a suitable cartridge for medium size game like deer/antelope. But if you're going to try it you need to stay with a somewhat heavier bullet if possible for best results.
That buck doesn't look very big to me & at 30 yds that light weight bullet at high speed is really cruising! Any antelope is on the light side, even a buck but a heavier bullet, especially a long shanked one like the Ferminator is a much better choice if you're going to choose the 327.
Kind of like choosing a 9mm to tackle a big bear... Not even sure where I got them but I have 5-6 boxes of that Federal factory 327 ammo mentioned in both 85 gr & 100 gr & I've never fired a single round of it but as mentioned I've heard it's quite fast.
Light weight ammo at high speed always scares me a bit when used on game, just my opinion.

Dick