7mm TCU H335 145g pet loads

[Old Man with Gun]

I have a new Contender barrel and am looking for load data. Barrel is 10" and I am planning on H335 and starting with Speer 145g grand slams. Flexible on the bullet but want to stick with H335 as I have a bunch of it.

What are your favorite accuracy loads? Want to shoot steel to 300+

Thanks in advance!