Heavy .117 pellets+no power

PSA it don't work lol. Tried my favorite high velocity pellet(h&n 11.57gr Silver point) that did best in my nitro piston elite through my anemic markpoint and at just 5 feet rounds are keyholing completely sideways. They make it out of the bore unlike the rabbit magnum 2's but I never would have thought you could get so little stability from such a good pellet. I really need to find a good lightweight low velocity pellet with a big skirt. Usually with silverpoints you have to cut them onto the rifling but in the markpoint they fall right in. I've got some gamo tomahawk, magnum country, and crosman premier but those are all about 7.5gr. That's almost a full second flight time from firing to impact at 20 yards with the weak markpoint. Most everything else I got is tailored for 800+fps. Does anyone have a solid, super accurate pellet somewhere in the 4-6.5gr range, ideally with a big skirt? I've tried the sabot steel penetrators and those are ok but not crazy accurate. The markpoint isn't fast enough to set off blik pellets so I don't really want to waste those but it's the only ultralight projo I got. Anyone have luck with the fast flight pellets? They got a few different ones but I can't tell what's good.