And even with the wrought iron breech band those weapons had a higher propensity for breech explosion nastyThere were some Confederate Napoleons made from cast iron but none of wrought iron (that I know of) and no Union cast iron guns (again, not that I know of). Parrots were made of cast iron with a band of wrought iron around the breech but a better technique (Reeve's process) later allowed the Ordnance rifles to be made of several bands of wrought iron which was lighter and not as brittle. Not too long after, steel started to become the standard.
There is some disagreement about whether the field pieces were really that bad but there are photos of heavy Parrots with burst barrels. Many think those guns gave all Parrots a bad name with a few officers. The Ordnance rifle certainly became the favorite.And even with the wrought iron breech band those weapons had a higher propensity for breech explosion nasty
the 1841 24Lb Howitzer was a bronze weaponI am confused. What is it you are getting at? I have never heard of bronze 24 pounders.