13 February 2007, 07:56
Idared1-16, 360 ??
I recently picked up a 1903A3 Springfield in 35 Whelen AI. Upon taking the barreled action out of the stock I discovered the following stamped on the bottom of the shank on the barrel.
1-16
360
Now 1-16 makes some sense to me as I assume it means 1 in 16 twist. But, 360 is a bit more puzzling. Any ideas?
Many thanks
13 February 2007, 08:05
Bill LeeperSeems most likely to be the groove diameter of the barrel. A little oversized but probably not uncommon. Regards, Bill.
13 February 2007, 08:11
IdaredThanks for the reply Bill. Seeing as how this is 360 rather than 358 could this could possibly indicate the barrel was rebored at one time? It is not a particularly heavy barrel for a 35 caliber.
13 February 2007, 17:03
jeffeossoCould have been bored to 360 intentionally, and meant for GC, then rechambered for the AI,,,
slug the barrel, and you'll know in 15 mins

14 February 2007, 04:09
Yentna RiverOne complete turn, 360 degrees? Just a guess