Thank you for the responses, the problem has been discovered as a combination of the gap between the auger and the axle, and also the diameter of the hole for the pin being to large which leaves a lot of room for the pin to move around and bend.
I have a shear pin on a snowblower auger that is bending before it shears. I'm currently trying to figure out the max shear force the pin can take, having the materials given for the pin. The thing is, I'm not sure if I need to account for the bending of the pin or just try to solve for shear...