First chamber cast

[Randy Bohannon]

So after playing’guess what bullet will fit and work well’ and eventually stumbling on I have no leade in my chamber.
Always had to seat fat .410” 400 gr. bullets so deep I could never get 70 grs of any powder (B/P)
So I finally did a chamber cast and here’s what I have , I have not measured anything yet as I was interested in the chamber / rifling transition. I see no 45 degree transition , am I missing something ?

Rifle is a Shiloh 1874 Sporter # 3 40-70 SS , the only bullet that has showed any promise is a dual diameter Steve Brooks ‘Money Bullet’ cast 16:1 .

Now I want a paper patch bullet dual diameter mould . I am thinking .402” base for .375” then .394” to ogive 415 gr. Money bullet nose design .
Am I all wet here ? Just trying to learn to solve these kind of things.