That is a heavy ball-twist. My guess is that it will shoot em just fine.
The rules of thumb are (that is, if your gun knows them) that 1-66 or so twist is for round-balls, 1-28 is for conicals. 1-48 or so is to TRY to shoot both (it may, but it won't be real accurate).
Now, your gun will likely have certain bullets that it shoots well, and others just so-so. Go out and try them all and find out how it does.
Also, your bore SHOULD be seasoned, but it don't have to be. You can season it as you shoot. But, I'm reading where guys that expect a seasoned gun to not need to be cleaned, they are finding rust in their gun. but, a seasoned gun is easier to clean.
I've never found the need for anything under my bullet, but I ain't never tried it and I don't know what it does to accuracy. My gun already has accepatable accuracy.