Keep working at the load, you will get it shooting better and better!!
Your chamber is the only one like it, you need to find your sweet spot all barrels are different, what mine likes quite likely yours will not and may not even chamber... I like the Stony Point gauge for finding seating depths. But you could do it yourself, keep seating it deeper and watching closely for sign's of contact. Don't be suprised if your bullet is outta the case before contact is made... some barrels have mighty long throats... Others closer to what you would call standard.
CW