I have shot a lot of 150gr pointed bullets in my M94 Winchester. Shot just fine.
But, they are made for 308 velocity and might not have good expansion at 30-30 velocity. Don't know. Never tried.
Before trying the "One up the spout, one in the mag" trick, make absolutly sure the OAL is OK. With a tubular magazine, you can easily shove any length in, but if it is too long, it won't cycle and won't come out. The ogive on a pointed bullet might not allow you to seat the bullet deep enough.
I had a lot of ex-military FMJ to plink with, so plinked them single shot, or loaded them upside down, to make a short eange wad cutter. Worked just fine using a start load.