375, When your talking about Worthen metalwork, for me I like his bolt lock. I was lucky to find a 1903 barreled action he did. It was in a junker stock, but I bought it cheap and the metal in great shape. I restocked it and have hunted 2years with it.
I am left handed so on other 03s I’ve hunted with the bolt handle contacts my hip/side and lifts. Worthens bolt lock works well, I would say the bolt says putt about 80% better. BTW it not really a “lock” but a simple friction. Dan