The Short Action Magnum bolt head (B.H.) is longer, .125 longer(@ the lug) than the standard short action. This requires some machine work or parts replacement to get correct firing pin protrusion and maintain the correct spring compression/tension.
Another alternative that I like is shortening the nose on a long action magnum B.H.this is only .062 longer(again in lug length). Thus the mod is slightly less effort to achieve F.P. protrusion.
Here is some info found in the faq section.
http://www.savageshooters.com/conten...Configurations
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