Tubular magazine lever actions need blunt-nosed bullets, which compromise ballistic performance.

Box or rotary magazine-fed lever guns allow you to use spitzer bullets, which give you modern ballistic performance. Two examples of this are:

Box fed: Browning BLR.

Rotary fed: Savage 99.

You can find Browning BLR's in .243, 7mm08, and .308. I have one in .308, and it is a very good performing carbine.

Savage 99's might be found in .250 Savage or .300 Savage, in older models, and .243 Win, 7mm08, and .308 Win in later production instances.