I see all kinds of formulas and numbers and whatnot for penetration based on KE, momentum etc...

I switched to Alums for this years early season spots and went with the 2312's to cover lines. Shot great and I love them. Hey! I'll hunt with them too! They shoot great and are plenty heavy right! I used My Mighty Mite cause I'm a redneck, I'd just gotten it and I needed to learn how to shoot a short bow (<38" before)

So 3 deer and not a single passthrough. Good hits(one a little too far back) under 20 yards. I used three different heads. Magnus snuffer 3 blade, Steelforce premium, and Magnus Stinger 2 blade...all 125.
Here's the setup.

MM @28" 71.25lb
shooting 28" 2312's (455grains)@ 238-240fps( a little quicker when colder)

I know the KE and I know the Momentum....but why am I not blowing through these deer? I had no problem with my 1995 Martin Cougar and janky Cabela's carbon arrows I started with.

The only thing I can think of is the fat shafts are causing to much friction?!?

Can anyone say, with certainty, that it make that much difference? I want to stick with heavier arrows (I shot much lighter before) but I really want to know what the story is with this setup.

Whassup??