You don't have a super strong action, so you'll need to keep loads in the same pressure range as standard lever action 30-30 rifles need. That being the case, take a look at bullets in the 150 to 165 gr. range, not the light varmint bullets, but those intended for cartridges in the .300 Savage listings. Loading data that will give you around 2250 feet per second with flat or round nose 150 gr. bullets should give about 2400 with pointy ones.
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