I don't change anything for the ringing 10, because I figure it was a good shot. If it happens frequently then I may tweak my entry angle, but the shot that leaves the ringing 10 will usually have a good carry percentage.

The flat 10 requires a change in entry angle. First, I usually try hitting the 1-3 slightly higher to send the 3 more to the right, which helps the 6 do it's job.  On the flat 10 the 3 pin usually heads straight back, which sends the 6 sideways to lay in the channel. 

Assuming your angle is good then I look at other causes for the flat 10, such as the ball losing energy too fast by finding friction too early.  We are all different. We throw it with varying speeds, rev rates, rotation, etc., not to mention the myriad of different balls at our disposal.  What works for one might not be the answer for you, but don't be afraid to try.  Leaving 10 after 10 after 10 can drive you nuts if you let it.

I look at changing my angle this way:  If all I am doing is shooting spares, I can tweak my entry angle and still make spares in the worst case scenario.  If it works then all is fine again.  Once you decide to change, then commit to it and be fearless so you'll release the ball well...

Thanks for your input, TWOHAND834, I liked hearing that you occasionally leave the 10 standing!  For those of us with rev rates in the "human range" we may attack the issue differently...  My rev rate is VERY human.

Two things can cause a flat 10:  The first is maybe there is carrydown and the ball doesnt really get into the hook phase (skid/roll/hook).  It lacks entry angle and deflects alot after hitting the pocket.  The second is there isnt enough oil in the front part of the lane and the ball loses energy getting down the lane.  Even if it hits the pocket, the ball has nothing left and also deflects alot leaving the flat 10.

You've got that a bit backwards.  It is skid/hook/roll.  The flat 10 can occur when the ball does not get into roll phase.  That is also the most likely cause of the dreaded 8-10 pocket split.

Thanks for your input, TWOHAND834, I liked hearing that you occasionally leave the 10 standing!  For those of us with rev rates in the "human range" we may attack the issue differently...  My rev rate is VERY human.

LOL!!!  Yes I can leave my share.  Regardless of rev rate, it still boils down to entry angle.  I have gotten better at knowing that to kick a ten playing up the track, you can be more up the back of the ball but still need some backend.  Once you move deeper, you need to increase your axis rotation to kick the ten.  All of this is providing you have the right ball in your hand, or my case, hands. 

@Hank....I may be wrong but I am not sure that anyone wants their ball to hook in the midlane before it rolls.  I have always known it to be skid/roll/hook.  In my case, if the ball hooks in the midlane and rolls on the backend, I should be happy with alot fo 9 counts providing I even hit the headpin.

So I was incorrect.  I researched it at another site.  Seems weird that you would want the ball to hook in the midlane.  But, oh well.  I stand corrected.

So I was incorrect.  I researched it at another site.  Seems weird that you would want the ball to hook in the midlane.  But, oh well.  I stand corrected.

The 3 phases don't say WHERE the ball reacts, just how.  The hook phase can take place anywhere on the lane. 

Remember hook is just the deviation from a straight line. A ball can start hooking in multiple places. Just cause the phases are in order of skid/hook/roll doesnt mean that they happen in the same place and for the same amount of feet on the lane.
If that were the case what would be the purpose of all these balls on the market?