I have a box of CCI Gold Dot 50 gr HP ammo. I decided to try them today. I was using an almost new Marlin 25MN rifle. They clocked at a rather lame average 1450 fps. After firing 10 rounds, I went and retreived the target that I had placed at 47 yards. The large HP made perfect circle holes, BUT the rest of the hole had a definite oval shape with rifling stripes on one side. It appears that the bullets are trying to "keyhole." I believe that Marlin uses a 16" twist in their magnum barrels. It looks like a 16" twist may not be enough to properly stabilize the 50 gr bullets. Has anyone else had this problem with this ammo?