Here's a small (roughly edited) pile of 1800s-era rifles and cannons, close and distant perspective, plus a cannon on wheels rolling on a dirt path. Recorded at a Civil War re-enactment so there are some bits that have stray talking etc. on the tailoffs. Some of that may disappear into the din of a battle mix though--I used these sounds as the basis of an 8 min. battle scene a few years ago. This is just a few of them; there are more. It's an old recording but hopefully it will help.
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I think I've got some stuff along those lines. How quickly do you need it?