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Crowning Barrels- Which Crown is Best?

This is a discussion on Crowning Barrels- Which Crown is Best? within the Gunsmithing forums, part of the Firearm Forum category; I have a few rifles that need or could use a new crown. I have a Rossi 92, a bubba'd Mosin Nagant, and a bubba'd ...


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Old April 17th, 2017, 04:37 PM   #1
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Crowning Barrels- Which Crown is Best?

I have a few rifles that need or could use a new crown. I have a Rossi 92, a bubba'd Mosin Nagant, and a bubba'd Schmidt Rubin that need some love.

Which brings me to crowns and their degree.

I see many tools offering the 11/79° target crown. Talking to Waveform, he has experience with the 45° crowning tools (and many of my firearms have this crown).

Which is better? If one is better, why use the other? Are there weaknesses to either crown? Should I consider a different crown?

Bonus question: if you have input, what crown would be best for the sporterized Schmidt Rubin, Mosin, and Rossi 92 in 357?



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Old April 17th, 2017, 05:18 PM   #2
 
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The best one is the one with the most uniform transition.

Accuracy wise the angle or shape does not matter, uniformity does.

That said, some angles, shapes and especially a recessed crown may protect that transition edge more than others which can be a good thing.
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Old April 17th, 2017, 05:24 PM   #3
 
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I always liked the recess crown.
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Old April 18th, 2017, 07:26 AM   #4
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Quote:
Originally Posted by Yetiman View Post
The best one is the one with the most uniform transition.

Accuracy wise the angle or shape does not matter, uniformity does.

That said, some angles, shapes and especially a recessed crown may protect that transition edge more than others which can be a good thing.
Does the method of applying the crown matter? Is a lathe better than crowning tools?
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Old April 18th, 2017, 12:03 PM   #5
 
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It probably matters more who does the work (how careful they are), but I would say a lathe has some advantages.

With careful satup the crowning tools can do an excellent job too.
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