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Rifles, Reloading, Optics, Equipment
Reloading
Forster co-axial press
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<blockquote data-quote="boomtube" data-source="post: 302127" data-attributes="member: 9215"><p>"I was told by a very knowlegable and respected gunnut in local circles - who happens to sell a lot of both these presses - that he would much rather spend the extra$ and upgrade to the co-ax. Main argument being the alignment that is (automatically) controlled by the case and not the press, and that this results in less runout."</p><p> </p><p>If any press is bored and threaded perfectly and the dies are perfectly mounted and the ram has zero side play concentric ammo can be made on it. But, in real life such things are rarely perfect. If the alignments are not perfect, we can use the Co-Ax press, with it's floating die holding method, and get concentric ammo every time. If our press is not perfect we can play with largely pointless tricks such as using rubber rings to retain the shell holder, which can only allow shell holder movement in one direction, and we MIGHT get concentric ammo.</p><p> </p><p>But, in ANY press-to-ram fit that has a bit of slack (slop), the case can easily SELF align to a die as it enters, as precisely as in a Co-Ax with it's floading dies. Meaning, the popular myth of a truly tight ram-to-body fit is badly misplaced. </p><p> </p><p>ALL that a super tight press CAN do is force a bad fit, it's really no mechanical help in obtaining a precise fit at all. Sized cases with bannana shapes come from tightly fitted presses, not old, "worn out" presses.</p><p> </p><p>BR shooters with their hand dies and arbor presses have the ultimate in "sloppy fit". But their totally floating die and ram system insures they get a maximum precision fit and accuracy without ANY rigidity of alignment.</p></blockquote><p></p>
[QUOTE="boomtube, post: 302127, member: 9215"] "I was told by a very knowlegable and respected gunnut in local circles - who happens to sell a lot of both these presses - that he would much rather spend the extra$ and upgrade to the co-ax. Main argument being the alignment that is (automatically) controlled by the case and not the press, and that this results in less runout." If any press is bored and threaded perfectly and the dies are perfectly mounted and the ram has zero side play concentric ammo can be made on it. But, in real life such things are rarely perfect. If the alignments are not perfect, we can use the Co-Ax press, with it's floating die holding method, and get concentric ammo every time. If our press is not perfect we can play with largely pointless tricks such as using rubber rings to retain the shell holder, which can only allow shell holder movement in one direction, and we MIGHT get concentric ammo. But, in ANY press-to-ram fit that has a bit of slack (slop), the case can easily SELF align to a die as it enters, as precisely as in a Co-Ax with it's floading dies. Meaning, the popular myth of a truly tight ram-to-body fit is badly misplaced. ALL that a super tight press CAN do is force a bad fit, it's really no mechanical help in obtaining a precise fit at all. Sized cases with bannana shapes come from tightly fitted presses, not old, "worn out" presses. BR shooters with their hand dies and arbor presses have the ultimate in "sloppy fit". But their totally floating die and ram system insures they get a maximum precision fit and accuracy without ANY rigidity of alignment. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Forster co-axial press
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