shooting low

[Knobbir]

I tend to shoot low- almost every time, regardless of the bow poundage, wind, type of bow (often with guns too), up or down hill, type of target, or distance.
If it helps- I shoot a 58lb longbow, 70.5" length with 55lb spines, 5in fletch, 30" length total, and 165 gn points, but have a couple that are 145 gn. My draw is 28". I also shoot 52lb and 49 lb bows with the same arrows. I can cast an arrow to a butt type target at 40-50 yrds no problem with any of those bows(but it is obviously lower than where I aimed). I shoot instictive, split finger, glove. String nocks do vary 3/8" to 5/8"  above 90 degree mark, depending on the bow.
The only time I am above aim point is under 10 yds. I actually shoot more at the aim height if it is steep up hill.  I'm actually worse at a slight down hill. I tracked 100 arrows between the bows, at various distances between 15 and 22 yrds, with a slight up hill grade, and 92 were below aim height. I also tracked which arrow was which, and arrow/point weight showed no aberant pattern at any distance.
I even tried a wheely bow yesterday, with some fancy sight device, and was still lower than point of aim.  I shocked that bow's owner that I was low on all four arrows I shot.  
I mentioned that I thought I had a form problem a couple weeks ago to an old timer at the range.  He thought my form was pretty good, for what it was worth. I've tried blind shooting, at about 5 yds, but I did not improve much, and none over the long term.
I rarely shoot with company watching, so I'm not sure how to video or take pictures of myself, let alone up load video here.  I am beginning to wonder if I've "taught" myself to shoot low because that's all I do.
Any thoughts on how to correct this?

[reddogge]

Change your sight picture or try lowering your nocking point a little. Make sure you aren't dropping your bow arm on release also.

[Knobbir]

I understand how to lower a nocking point, and that I may be dropping my arm (overbowed?), but what do you mean "change your sight picture"?

[Kevin Dill]

Nothing beats video while shooting your bow. The same can be done with an experienced eye, but slowing down video and finding form errors (or arrow flight problems) is invaluable.

You could try a higher anchor (which seems counter-intuitive) which brings the arrow closer to your dominant eye.

My honest guess about your consistent low shooting is that it has roots in your brain...meaning your brain is 'forcing' you to release despite knowing the arrow impact will likely be low. You can test this theory by deliberately trying to shoot 6 inches above the bullseye with a good slow draw and anchor. If you find it a struggle to conciously raise the point of impact just a bit, that tells me your brain is controlling the shot timing or bow position. This (if so) is a form of target panic.

You'll get a hundred suggestions on how to beat target panic. My advice is to stay extremely close to the bale (5 yards) and work only on form to the exclusion of everything else. Get the arrow OUT of your mind and focus only on the bow and yourself. Thinking about the arrow and its point of impact is a major detriment to overcoming mental issues with shooting a bow. The arrow (flight and impact) is a result of what YOU do with the BOW and YOUR BODY. The arrow is not within your control...so forget it and focus on shooting form. Give it 4 weeks at 5 yards...don't cheat...and see what happens. I think you might be amazed.

[reddogge]

I mean if your sight picture is a certain gap between the point of the arrow and the spot you want to hit at a certain yardage, make the gap smaller. The arrow will impact higher.

[Jmatt1957]

Had the same problem several years ago. It was suggested that I work on my follow through by keeping my bow arm up untill the arrow hits the target. it really helped me.

[Rick Richard]

Try a completely different approach like 3 fingers under and see what that does.