As a collector of Cal .30 (30-06), particularly the Match cartridges , I find it interesting that the last use of corrosive primers and the first use of non-corrosive primers both occurred with Match ammunition. What you may find interesting is that the two were 26 years apart and not in the sequence that you’d expect.
The 1956 Cal .30 International Match ammunition that was discussed on an earlier thread was loaded with the FA #26 primer, a potassium chlorate based corrosive primer. At the time, it was felt that the chlorate primer gave more uniform ignition and better accuracy which explains its use in the Match cartridges. What is ironic is that one of the unintended side benefits of the first use of non-corrosive primers was improved accuracy.
In 1930 Frankford Arsenal developed a non-corrosive priming mixture based in large part on mixtures used in Europe. The only problem was that the amount of the mixture needed for consistent ignition was more than the Boxer type primer cup could accommodate. So they turned to a Berdan cup and manufactured new cases with the integral anvil and twin flash holes. They loaded nearly 3.5 million National, International, and Palma Match cartridges with the new cases and primers. This ammunition produced one of the best accuracy records ever achieved, and seemed to be the answer to both the non-corrosive primer and Match accuracy goals.
Shortly after the National Matches started there was a spell of abnormally hot weather at Camp Perry and it was reported that the ammunition was showing signs of high pressures. The Ordnance Department immediately withdrew the National and Palma Match lots and replaced them with ammunition having the regular primer and standard case, and announced that experiments with both the Berdan cup and the non-corrosive mixture would end. This seemed like a hasty decision given that both had been used in other countries with more extreme climates for many years, but the decision was final.
The Berdan episode was the end of non-corrosive primers in U.S. service ammunition for the near future, at least. Experimentation toward better primers continued at Frankford on a continuing basis for the next 20 years and the non-corrosive primer finally replaced the decades old FA #70 shortly after the Korean War.
The 1930 Berdan primed cartridges can be identified by the headstamp - F A 30 R - and the carton label. These cartridges have probably passed through the hands of collectors without them knowing what they had. So, keep you eyes open.