You don't say what bullet style you're using. Perhaps a change in the type of bullet will eliminate the problem, maybe a bullet with a higher jacket. I don't have any experience with this specific rifle, but I do know that some firearms' feed ramps (the ramp the cartridge rides up, bullet first, from the mag into the chamber) have machine marks remaining from the factory machining operation. These marks can be enough to cause resistance and/or damage to a soft nosed bullet. I took a piece of emery cloth, wrapped around a short piece of dowel rod, to my .45 auto feed ramp and, working carefully, took out the machine marks. Might be possible with the 760.