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Old 01-13-2016, 02:41 AM
17tbs 17tbs is offline
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Join Date: Oct 2007
Posts: 612
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Chickenthief,

Yes, the lands are typically 0.168" I don't know what mine is, I do know that my chamber throat was rather odd shaped with an incline from a .1730" to 0.1724" for the first 0.03" then a 1.5° leade angle from there onward. The effect is that I can seat the GSC banded 17 and 19 grain solids that mic at 0.1730 on the tops of the bands with groves cut at 0.1695" is right into the case and right into this tapered throat and therefore it's practically ensured of a straight start. At 0.170" the front half of my heavily modified 4.6 now floats way up into the area about half way between the 0.1724" end of the throat and where the tops of the lands are encountered, it pretty much kisses this whole transition area for about 0.05" .

It sort of just eases in on the lands since there is only 0.001" difference in each side, maybe even less since the calipers are not precise enough for a 0.00001" measurement.

Larry, yes there is a way to get it to fly straight, put some feletching on it.
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