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Post by hogwild on May 29, 2013 20:08:13 GMT -8
I am working on my first build of a 6.8 SPC II. I have sent my 16 inch BHW barrel that recently delivered to me to my builder in Texas. He said BHW doesn't crown a barrel like he does, but that doesn't mean it won't shoot great. He went on to say that the bolt from A15 performance head spaces perfect with my barrel.
My question is would someone provide a short tutorial on barrel crowns as I hear it can be done several ways. Hopefully, someone can describe BHW approach/specs for their barrels.
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Post by GLSHOOTER on May 30, 2013 12:53:15 GMT -8
I am working on my first build of a 6.8 SPC II. I have sent my 16 inch BHW barrel that recently delivered to me to my builder in Texas. He said BHW doesn't crown a barrel like he does, but that doesn't mean it won't shoot great. He went on to say that the bolt from A15 performance head spaces perfect with my barrel. My question is would someone provide a short tutorial on barrel crowns as I hear it can be done several ways. Hopefully, someone can describe BHW approach/specs for their barrels. Grossly out of focus but maybe you can get a sense of these. Left to right. #1 Flat Floor Board. perfectly flat across the muzzle. Common in many accuracy BR barrels #2 11 Degree Crown. BHW choice gentle 11 degree dish into bore One of the most common type for quality barrels. It will usually run all the way to the edges but may have a tiny raised area on the circumference. #3 Step type. Flat across the bore with a ridge around the flat area for protection. This one is on a CZ 527 204 Varmint #4 A standard crown. Just a rolled cut down into the muzzle. Most common on regular hunting rifles. This is a 243 700 Remington sporter weight. A good articles: riflestocks.tripod.com/targetcrown.htmlThe flat is done easily and gets rave reviews but no protection. The local BR wizard uses these. The 11 degree is super as it does give some protection to the bore and seems to be ideal for bullet exit. The combo step is good as a compromise and may well be the best of both worlds. The last is, IMHO, adequate for most needs but can get buggered up pretty easily. Just a short synopsis. Greg
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Post by hogwild on May 30, 2013 14:24:41 GMT -8
Greg
Thank you for taking the time to provide this very informative post. A picture sometimes is worth a thousand words especially with words that explain the pictures. If I understand correctly BHW uses a gentle 11 degree dish into bore as their approach?
John
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Post by GLSHOOTER on May 30, 2013 17:27:32 GMT -8
Greg Thank you for taking the time to provide this very informative post. A picture sometimes is worth a thousand words especially with words that explain the pictures. If I understand correctly BHW uses a gentle 11 degree dish into bore as their approach? John Yes, that is correct. The angle has been worked out over the years and the 11 degree appears to be the best transition for the bullet on exit. The drawback from the manufacturers point is that it is not as easy to do as the flat ones thereby adding $$'s and time to the final product. I think esthetically they are very pleasing to the eye. I like good looks and they supply both that and performance so for me it is a win win. I'll have a camera out tomorrow for pics of my 20 PRACTICAL BHW build that I want to post up so maybe I'll grab my barrels and try and get one that is in focus a bit better. Greg
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Post by hogwild on May 31, 2013 11:10:16 GMT -8
That would be great.
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Post by GLSHOOTER on May 31, 2013 16:25:28 GMT -8
Same order. Bonus Pic of a Savage 22-250 AI. This one was re-crowned after being rechambered I believe. I don't own another Savage so maybe Ritch will chime in. I'm not sure if it is the 11 degree with a raised protective outer ring. The BHW is a 20 caliber barrel so it may well be a visual and the BHW is also larger in diameter. Greg
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Post by Deleted on May 31, 2013 16:49:52 GMT -8
The barrel on the Savage is a recrown. The factory Savage crown looks similer to the third barrel in Gregs picture.
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