Gruff,

Compare the photo of the Schuler rifle with that of your action. The bolt knob is nowhere near the bottom metal in the Schuler rifle, and even allowing for the fact that your bolt handle is longer, the proportions of the stock are distorted, which is clearly not the case with your action.

In the Schuler rifle the barrelled action appears to have been perched on top of the stock and the trigger guard added below as an afterthought.