There was a time that the 243 1B was fairly available on the resale market and at very good prices as they were not much sought after. I used several as donors for bigger bore projects. I kept my 6mm Rem 1B intact as I prefer it over the 243.

243s in 1A or RSI cofiguation woud make a good kid's or small framed woman's deer/varmint rifles. And it is legal for deer in states that ban the 22 calibers.

1B