I finally got my YHM 7.62 can the one with the quick mount. I put it on my AR, it is a ARperformance upper that has a 20 in PacNor barrel 11twist and shoots the 6.8spc. My problem is when I put the can on I can not hit anything without the can it is very good shooter. I put my target on the a board roughly the size of a stop sign with the can on at 50-60 yds I dont even see hole. You take the can off still leaving the quick mount on and it is off of my 0 no more than a 1/2". Is this something I am doing I have shot about 20 rounds thru it and all Hornady 115s. Is it me, the Horandys, the gun or can, or combo of all. Just seems like it was a waste of my money and time if this is how its gonna be when shooting the can. any help?