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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Custom rifle with short freebore
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<blockquote data-quote="J E Custom" data-source="post: 1219870" data-attributes="member: 2736"><p>If you load to magazine length minus .010 to .020 the SAMME dimensions will give you plenty of freebore. If you shoot close or touching the lands you may have to single load.</p><p></p><p>It is assumed that seating close or against the lands improves accuracy, IT does Not. some bullets</p><p>shoot better .020 off the lands and others shoot there best at or over .100 thousandths off the lands.</p><p></p><p>I have seen bullets like the Bergers perform from .000 to .120 of the lands. The only time that it may be an advantage to jam the bullet against the lands is if you are shooting poor quality ammo (Factory or re loaded) or a poor quality chamber that is not concentric. </p><p></p><p>With a good concentric chamber and concentric and properly sized ammo it is not necessary for the bullet to touch the lands to be centered.</p><p></p><p>The bottom line is that anything that is done poorly effects accuracy.</p><p></p><p>Weatherbys are known for there velocity and they all have generous freebore (.361 to .373) on all but the 378 and 460 that have .756 For the use of round nose bullets.</p><p></p><p>I own 4 rifles that will all shoot under .100 5 shot groups and one of them is a 30/378 with a .361 freebore and consistently shoots less than .100 (1/10th of a MOA) I also load everthing to mag length minus .010 to .020,</p><p></p><p>So if it shoots good and you are happy with accuracy, Don't touch it. Just watch for signs of pressure. </p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1219870, member: 2736"] If you load to magazine length minus .010 to .020 the SAMME dimensions will give you plenty of freebore. If you shoot close or touching the lands you may have to single load. It is assumed that seating close or against the lands improves accuracy, IT does Not. some bullets shoot better .020 off the lands and others shoot there best at or over .100 thousandths off the lands. I have seen bullets like the Bergers perform from .000 to .120 of the lands. The only time that it may be an advantage to jam the bullet against the lands is if you are shooting poor quality ammo (Factory or re loaded) or a poor quality chamber that is not concentric. With a good concentric chamber and concentric and properly sized ammo it is not necessary for the bullet to touch the lands to be centered. The bottom line is that anything that is done poorly effects accuracy. Weatherbys are known for there velocity and they all have generous freebore (.361 to .373) on all but the 378 and 460 that have .756 For the use of round nose bullets. I own 4 rifles that will all shoot under .100 5 shot groups and one of them is a 30/378 with a .361 freebore and consistently shoots less than .100 (1/10th of a MOA) I also load everthing to mag length minus .010 to .020, So if it shoots good and you are happy with accuracy, Don't touch it. Just watch for signs of pressure. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Custom rifle with short freebore
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