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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Throat testing
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<blockquote data-quote="MagnumManiac" data-source="post: 2012233" data-attributes="member: 10755"><p>I haven't tested with actual barrels by changing them dozens of times, but I have changed throat/leade angles and lengths when I have set back and re-chambered.</p><p>When changing my first 300WM barrel from SAAMI to the A191 chamber, accuracy improved straight up, it was more consistent and easier to tune. Since then, leade angles on reamers have been played around with but length has not. The angle needs to transition smoothly in my limited experience, but have not nailed that 'best' spot yet. My Weatherby chambers run .0005" clearance while most other throats run .001". Although .0015" is also mentioned on some reamer prints.</p><p>I also lengthened the throats on all my Weatherby chamberings, except my 270Roy, from .375" to .500" and had an improvement with accuracy, but also a better curve under MAP while gaining velocity.</p><p>Hope this limited knowledge gives you an insight.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2012233, member: 10755"] I haven’t tested with actual barrels by changing them dozens of times, but I have changed throat/leade angles and lengths when I have set back and re-chambered. When changing my first 300WM barrel from SAAMI to the A191 chamber, accuracy improved straight up, it was more consistent and easier to tune. Since then, leade angles on reamers have been played around with but length has not. The angle needs to transition smoothly in my limited experience, but have not nailed that ‘best’ spot yet. My Weatherby chambers run .0005” clearance while most other throats run .001”. Although .0015” is also mentioned on some reamer prints. I also lengthened the throats on all my Weatherby chamberings, except my 270Roy, from .375” to .500” and had an improvement with accuracy, but also a better curve under MAP while gaining velocity. Hope this limited knowledge gives you an insight. Cheers. [/QUOTE]
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Throat testing
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