Yep, patches are burning through...You will never have good groups until yourpatches look like you can use them again...

Now, you have learned what not to do, fix it...

Go get some real black powder, Pyrodex will work, but I am partial...

Go to thicker patches...Also, what was your lube???

With Pyrodex or Goex and about 75-80grs, and thicker, properly lubed patches your groups will shrink...

If they don't, I have more suggestions, but let's just keep it simple and fun for now...