Memories. As a young scribe, I got a couple letters from Mr. O'Connor, one regrets to my invitation to hunt deer in Nova Scotia, and the other on 7mms which he favoured, particularly my "light and whippy" Brno which he described as a great saddle gun. Mention of 4831: I was using it in early 50s. A Mormon clergyman from the US West gave me some in a blue Planter's Peanuts can for my 7mm. Results were satisfactory. I still have the shiny bright-blue can on my reloading shelf with barely legible "4831" scotch-taped to the top.