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https://www.nzhuntingandshooting.co.nz/f32/marlin-30-30-setup-60150/index4.html

theres a bit about feeding issues on #18 post

I remember the hornady fn projectiles came in two types some years...

you would do a lot worse than to start there...and finish there LOL...Robert makes good projectiles,if you are a tw oshot 30/30 man,one might suggest you not looking for top velocity or barrel...

G&T....Indian tonic I hope....knew you were a man of good taste,this confirms it.

the issue is simple..you have a Marlin and not a Winchester....... the Marlins like a shorter skinny fronted projectile...the bullet makers make bullets specially for the marlins...I did a few same...