WV your patch may have been a bit too large. You want it snug but not too tight. Next time try trimming your patches. Start small and work your way up until you get the size that glides through the bore using a firm even pressure. Oh, and be sure to use a wet patch first. Obvious for some but not everyone - right BC?
And if you don't have one already, when you go to your gun shop, get yourself a bore guide.