I would cast with linotype or water dropped WWS. Linotype would be better if you are going to push the bullet hard. You will want to gas check if aproaching 2,000fps. One thing I have found that gives me concern is how deep I have to seat the bullet in the case to get it off the lands. Each individual weapon is of course different. I have found I have to seat with a OAL of 2.712 to keep it just off the lands. No problem with that except that the base of the checked bullet is so deep into the case, right around the shoulder, I am wondering if there will be gas blowby? Going to use Milsurp powder at a reduced charge and a dacron wad. This may stop the blow by and give good results.
Wish I would have already had the time to do this and answer your question but it is still something in the works.
Had to purchase a new case trimmer to do this also as I am using the primed cases that I pulled the bullets from. My Lee trimmers cannot be used to trim primed cases and bought a Wilson from Sinclair that will. Have all the components and tools, (except I still need a mounted bench vice to hold the trimmer) but just not enough time lately.
You using commercial cases and powder will of course make it a little more simple for you.
And now the bore being a little over sized may present a problem. I have found the mold drops bullets at around .325 to .326. Good for your oversized bore. But if you need to gas check them you need a check like the Lyman that just snaps on and can be done by hand. The Hornady needs to be pressed on to seat properly. Believe me I tried to seat a Hornady check on an unsized bullet from that mold, and it does not work. Tried to run it into my sizing die to seat without sizing the bullet and it still would not seat right. Tapped it with the handle of a screwdriver over and over and still could not get it to seat right. The Hornady crimps on when run though your sizer, The Lyman may fall off in flight, and some think that may make a difference. Others think the check has done it's job once the bullet has left the muzzle with no ill effects of it falling off in flight. You will have to experiment yourself to determine.