I bought a "like new" used SBS Pro-hunter 20" bbl, open 'v' rear and ramp-post front sight in 376 Steyr cal. I had reservations about getting ammo. But ordered some 225 gr. as well as Hornady dies. My press is only a HD hand 'mule-ear' portable. Well, here is my problem: This rifle, off a sandbag eith open sights and Hornady 225 gr load, shot 3 expensive rounds into one hole that could be covered by a nickel at 50 yds. I say "expensive" because the box of ammo cost $60 + $20 shipping out here to Bethel, AK. So the rifle is impressive and will take the rough treatment and shows verry goof potental. HOWEVER I was anxious to see how it reloaded. When I resized the first case there was a huge ridge at the base of the neck. Furthermore, when I put the downstroke the case head was sheared off by the no. 15 shell holder. What followed was akin to primitive plier-type machine-work. I think my rifle has a chamber that is significantly larger than the full length resuzing die--is such a thing likely?