Ammo inaccuracy - Hornady LEVERevolution .30-30 Winchester 160 Grain Flex Tip eXpanding Centerfire Rifle Ammunition

I shot this ammo in my 30-30 and my 308 MX with leverevolution 160 grain. Both rifles inaccurate. 30-30 was worse. I have cheap scopes on both, but my 30-30 used to be sighted in accurate using regular 150 grain Federal ammo. Killed many deer with that rifle until I changed scope mounts with same scope just lower to barrel with Burris zee rings. Could the harmonics changed after this or is hornaday Leverevolution ammo not friendly with older 30-30 Marlin 336’s? Getting better quality optics for both and raising 30-30 from low rings to medium and see what happens.