You are doing good for speed. The thought is that you want to be around 1300 FPS or 396 Meters per second. This speed is what is needed for especially 1,000 yard shooting. You can certainly do with less speed at the shorter ranges.
I have attached a couple of pictures with different angles of the same things.
You are right to experiment, as you know not every rifle likes the same thing.
The rifle I have been working with the past year and half is an original Rigby made in 1864. With what I was shooting in it the rifle was more accurate with the lower powder charges. At the world matches I was using 70 and 75 grains of 2f.
I needed to get more speed, so I had to go to work and find a accurate load that will get me the 1300 fps and the kind of accuracy I need.
What I found that this rifle likes is 86 grains of 2f swiss, with a .060" fiber wad (the brown one) on top of the powder, followed by the wool wonder wad that is lubed, then the bullet. My bullets are not lubed.
With this load, I am getting around 1295 fps and the rifle will shoot a 1 inch group at 100 yards.
So, with my new load I got a chance to try it out at Oak Ridge TN match a couple of days ago.
At 200 yards I did well, 300 yards I did average, 600 was OK and I won the 1,000 yard match. Ended up 2nd overall.
If you are not able to get the wool wads or would like for me to send you some to try I be happy to put some in the mail to you. I can also send you some of the .060 card wads as well.
keep us posted!
Fleener