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Hunting
Long Range Hunting & Shooting
FREEBORE ON WEATHERBYS
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<blockquote data-quote="chris matthews" data-source="post: 2279" data-attributes="member: 66"><p>I'll probably stir up some stink but here goes- freebore is generally not good for accuracy. I believe Weatherby does it because they think it increases velocity. Which in actually decreases it- the "open" area (freebore) could allow gas to escape around the bullet and decrease pressure thus decreasing velocity.</p><p> The reason this is bad for accuracy is the bullet slams into the lands and can cause the bullet to deform unevenly- canting it in the bore. As the benchrest boys have shown us most bullets shoot the best either in three positions: 1-Barely off the lands, 2- Lightly touching them, or 3-Seated firmly into the lands. When bullets are seated like this they are "pushed" into the lands, hopefully engraving straight and true with the bore.</p><p> But to further confuse the situation, I have a Howa factory rifle in .223. For those of you who don't know, Howa made actions for Weatherby for awhile. My Howa has an incredible amount of "freebore." Using the Stoney Point OAL guage and a 55gr Sierra BlitzKing to find the lands, I dicovered that left only the boattail of the bullet in the case neck. Seating the bullet as far out as the magazine would allow the bullet was over .100 away from the lands. The whole point to this windy story is the silly thing is a solid 1/2 MOA rifle and I regularly shoot prairie dogs out to 500 yards with it. So go figure!</p><p>To sum it up- shoot your rifle at different ranges and let it tell you if it's accurate or not.</p><p>Hope I didn't make it worse....</p><p></p><p>[ 07-14-2002: Message edited by: chris matthews ]</p></blockquote><p></p>
[QUOTE="chris matthews, post: 2279, member: 66"] I'll probably stir up some stink but here goes- freebore is generally not good for accuracy. I believe Weatherby does it because they think it increases velocity. Which in actually decreases it- the "open" area (freebore) could allow gas to escape around the bullet and decrease pressure thus decreasing velocity. The reason this is bad for accuracy is the bullet slams into the lands and can cause the bullet to deform unevenly- canting it in the bore. As the benchrest boys have shown us most bullets shoot the best either in three positions: 1-Barely off the lands, 2- Lightly touching them, or 3-Seated firmly into the lands. When bullets are seated like this they are "pushed" into the lands, hopefully engraving straight and true with the bore. But to further confuse the situation, I have a Howa factory rifle in .223. For those of you who don't know, Howa made actions for Weatherby for awhile. My Howa has an incredible amount of "freebore." Using the Stoney Point OAL guage and a 55gr Sierra BlitzKing to find the lands, I dicovered that left only the boattail of the bullet in the case neck. Seating the bullet as far out as the magazine would allow the bullet was over .100 away from the lands. The whole point to this windy story is the silly thing is a solid 1/2 MOA rifle and I regularly shoot prairie dogs out to 500 yards with it. So go figure! To sum it up- shoot your rifle at different ranges and let it tell you if it's accurate or not. Hope I didn't make it worse.... [ 07-14-2002: Message edited by: chris matthews ] [/QUOTE]
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FREEBORE ON WEATHERBYS
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