Guys I got a problem. When I put a quiver (Katani sp?) strap on quiver on my longbow, it hit to the left. Not once, but consistently.  I've bare shafted and got an arrow flying real good out of my bow, but when I put the quiver on.. The arrow goes left.   Not once, not every now and again, but every single time....

If it were just now and again, I'd say I'm doing something to throw the arrow... But on every single shot? I can take the quiver off and Bingo... Again, I'm not talking about every now and then... But something is strange.. What do you guys think it is?

Oh yeah. I have the quiver as far toward the riser as it will go, on the fade outs...

You will have to readjust your shooting with a bow quiver on your bow. It throws off the balance. I actually preferred a bow quiver on my Treadway bow. It gave it more stability...but don't like them on my wood bows.

Adding a quiver to your bow will actually change the way the bow shoots. It can change it enough that the spine of the arrow you normally shoot is not correct for the bow when the quiver is on it. For me I either practice and hunt with the quiver on or I shoot a removeable quiver and take it off when practicing or on stand.

Bottomline your observations are correct and pretty common place you just have to decide what solution you will use to correct the problem.

You'll need to practice with it on until you get the weight shift down. It's similar to a stabilizer & different than barebow you're used to. Once zeroed, you're good to go. Unfortunately, if you take it off you'll be back at square one again.

This is pretty normal Steve, esp with small handled longbows.  When the arrow is released, it presses against the riser and with the lightweight riser, the bow will actually move a bit.  The quiver and arrows adds mass to the bow so it moves less causing the arrows to shoot stiff.  Try going up in point weight and see if it helps.

Add some point weight or go downward in arrow spine.

Will try it tomm. guys. Thanks...Steve

"Add some point weight or go downward in arrow spine."

George, your knowledge of this stuff never ceases to amaze me. I live and breath this stuff, and my advice was going to be "practice with the quiver on"

When setting up your bow and arrow combination for tuning, you should have it exactly as you would when you plan to hunt with it. So when you tune your arrows put the quiver on and fill it with arrows minus one. Use the same brace height and string silencers as you plan to in the woods. Then tune the arrows. I would like to claim this wisdom as mine but it is actually from O.L. Adcocks instructions for tuning your bow. I wasn't sure if it made that much difference but your evidence would seem to indicate that it does. Maybe he does know what he is talking about.
Good luck

Do you shoot with a very light,loose grip? If so, the quiver probably torques the bow before the arrow totally clears it, causing the arrow to go left.   If that's the cause, just gripping the bow a little more firmly will usually straighten it out without any other adjustments to the arrow

amen to what george said....and also razor back.   if you're gonna shoot a bow with a bow quiver, tune and set it up with the quiver on.   throwing a quiver on just before the season, changes several things, one being mass (ie fletcher above), one being balance (ie orion) (now a good chunk of the bows mass is cantilevered off the right side of the bow), and depending on placement can even effect the movement of the limbs.  All of which can change what spine it wants, and what impact point is.

A quiver will deffinitly change the balance of a bow, somtimes it hurts or helps. I shoot better with one on my bow! I put a strap on quiver on my sons bow and it made all the differance in the world, tightend his groups right up! Jason

I have the same thing with my predator classic recurve.  Selway quiver attached- hit where I want to, take it off, hit to the left by 6 inches.
I have been practing with it on for a month, and just packed my arrow box to head up bear hunting, so I had the quiver off, and was shooting left....

You have to do your tuneing with the quiver on if you plan on useing it.Like George says..heavier point or weaker spined arrow for the fix.The new balance has the bow reacting differnt in your hand cause you to torqe it.jmo

I use the eagle flight quiver on all my bows and it doesnt effect the way any of my bows shoot.

Ive shot my bow thru a chrono with and without a quiver. The quiver slowed the bow 4-6 fps...maybe whats going on with yours.