Make sure your bow is tuned properly , and you are shooting properly spined arrows , and try a cut on contact 2 blade head [ ie , magnus , steel fource , exc.] You will get passthrus . Oh and make sure they are so sharp that you are scared of them .

I shoot similar setups or have in the past and have always had complete pass throughs except on one deer with a vortex head, never not cleanly blown through when using muzzys though. As long as I get an exit hole I don't care if it sticks in the ground.

as far as the bone or not issue, i have shot through ribs and not had probs and when i first started bowhunting, shot completely through the shoulder blade of a deer using old darton 50 MX at 55 pounds 2117 arrow and a muzzy 125 head.

Of all the deer I have harvested, I would 90% were pass throughs. If your poking him in the lungs, you should be getting pass throughs. It's got to be a tuning issue.

With a 65lbs set up I shot a 230 lbs 10 point in the front shoulder, it went all the way through the deer and out the back shoulder, through the bone. Fixed heads, proper arrows, prperly tuned bow you will always get a pass through (unless your shooting at 60 yards)

I disagree with that statement. Way too many variables to say "always"...

Todd, thanks for saving me some typing... Damn, I just wasted it

Well it's like saying, "deer will never jump the string if you have a quiet bow"....

Blanket statements like that are always open to many exceptions. I've had complete passthroughs at 55#'s with the arrow stuck in the dirt on the other side with great shot placement, and I've had one deer with great shot placement at 67# that did not get a total passthrough. Bone/rib density can be a tricky thing. Of course shot placement is crucial, but I think it is bad advice to tell someone that you always should get a passthrough.

i think one factor is where exactly the arrow makes contact, if it hits in between the actual rib bones then your going to get better penetration than if it hits a rib bone square on, same thing with the exit side, the arrow will be slowed more if it hits a rib bone square upon exit rather than in between the ribs. maybe!!

thanks guys. I guess i have to tune up my bow this summer. (i was shooting carbon arrows with a 28 1/2 inch arrow with a 30 inch drw and as small a mechanical diameter head as i could get and yes most shots are under thirty pounds)

I am new to this site and it has paid off already. Thanks again to everyone who replied.

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.