450/400 NE.I'm an idiot -- what rifle caliber uses a .410 diameter bullet?
I thought the older doubles were mostly .411”.This is for my 1906 WJ Jeffery 450/400 3in.
The 3 in typically measure .410 to .411 and the 3 1/4 can go .408 to .411. Mine measures .4105. Most of those swift aframes .410s actually measure .4085 to .409.I thought the older doubles were mostly .411”.