I bought a muzzleloading rifle for Vetterli and Whitworth.
Gun is propably made by Intermarco, but mfg name is not mentioned anywhere. Frame of striker assembly says "Creedmoor Match"

Rifle has 750mm long barrel with 6 riflings.
Diameters: 11,41mm (.4492) and 11.65mm (.4587)
Pitch of rifling is approx. 1:29"

I shot 84p in my first competition with this rifle using patch & round ball, as those are the only projectiles I have.
I tested different round ball loads using sandbags, but best groups were 38p at 50m (4 shots) Not bad, but not good enough.

What type of bullet you recommend me to try? Lee .450/294gr minie?
Do you have experience with Lee REAL bullets? Are they good with this type barrel?