In the National Archives yesterday, I found some really useful info on this question. RG156 Entry 118 contains records of issue of ordnance equipment to the organized militia, under the act of 1808. There were a great many entries in various forms, from memorandum entries to summaries covering decades. Issues to each state militia are segregated and accounted for individually.
For my project, I found many entries regarding issues of artillery tubes and carriages to New York, over a period from 1818-1840 (these entries contrinued but later ones are outside my scope.)
In most cases, "Brass Guns" entries were kept separate from "Iron Guns."
The most likely entries for my project involved issue of brass guns to New York, such as the following, near the bottom of the page in the attached photo. I apologize for the poor picture quality:
"1828 Dec. 6, (10) To, 40, 6 pdr. brass cannon and 40, 6 pdr. field carriages delivered from Arsenal at Watervliet $ receipt of A.M. Mann, (sp?) Comm. Gen. of the state."
This timeframe makes sense for another reason supported in Entry 118. On other pages, deliveries of 450 "percussion cannon locks" of two different types were shown as taking place in 1835. One type lock listed is described as "jerk-down type" and the other "stock" (sp?) type. My 6-pounder was modified after manufacture by filing off some of the protrusions on the breech to allow fitting of a firing lock.
Again, I don't yet have sufficient information to assure my "brass" 6 pounder was part of this particular delivery, but that transaction stands alone in a relatively long timeframe, from what I've seen. I'm thinking the other 6-pounder "brass cannon" deliveries prior to 1835 were a long time before that, at the latest 1822 from context, and those guns would probably have worn out before the percussion locks were issued in 1835.
If anyone has any data whatever on these two different percussion locks, please advise. I am familiar with the "Hidden" percussion lock issued to Federal artillery, and this may be the "jerk down" type referred to in E118.
I still need to find out who cast the "brass" 6-pounders during this period, so I've begun looking though the ordnance contract records in Entry 78.
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