I've uploaded an excerpt from a home movie of the 3rd RCHA, G Bty during a winter firing exercise sometime in 1959-60. While I believe the date and location are correct, I base this only the excerpt's placement within the larger amalgamated reels of home movies. It is possible that this could be 2nd RCHA, E Bty firing in Shilo (1958-59) or 3rd RCHA, G Bty firing somewhere in Germany in 1960-1.
https://www.youtube.com/watch?v=BAYvGMxMQHk
Jon