I've just bought a Uberti 1885 High Wall 45-70 and want to try bpcr silhouettes. I've never loaded black powder before and no one else in my club shoots black powder so I only know what I can find online.
I bought some 515gn hardcast boolits and loaded up 3 rounds with 59.5gns of Wano ffg, a cardboard wad from a cereal box and lubed the projectiles with 50/50 beeswax and petroleum jelly.
Seating depth was .725" and compression was roughly .2"
The 3 shots gave me a 2 1/2" group at 100yds which I thought was reasonable for my first group.
I didn't chronograph so have no idea of velocity or consistency.
But here is my problem;
I had to run a patch through after every shot or else the next the next round wouldn't chamber. The patch came out incredibly dirty and the fouling seemed a bit "fibrous".
Is this normal?
What is the cause of this and how do I fix it?