Then I'm sure you made note of the following (found in the FAQ Section):

For the last several years, Savage has used a smaller diameter firing pin on their magnum caliber rifles. The reason behind this is the bolt head retaining pin can use a small diameter through hole which makes it stronger. The standard caliber firing pin measures .145" in the area it would pass through the cross pin, the magnum pins are .095" in that area. Because the firing pin diameter is smaller, the cross pin hole is smaller. So is the the diameter of the hole through the bolt head.

Starting in 2001, Savage firing pin diameters were reduced on ALL models. Therefore, when ordering bolt heads it is important to know what diameter firing pin you have to work around.