It sure seems like you have done all your homework and done everything right Jin, I congratulate you. It really seems to work well for you!!! One thing we have found out on this site is every gun is an individual, there are general themes in the accuracy department but when it gets down to it, what works for you is what works!!! Good luck on the heart/lung shot and please keep us all posted, this is a very interesting topic and you are doing it RIGHT!!!....<><.... :grin: