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First custom rifle is here and i think its a keeper!!!!!

 
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  #92  
Old 09-18-2013, 10:02 PM
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Re: First custom rifle is here and i think its a keeper!!!!!

Quote:
Originally Posted by elkaholic View Post
No, what is the body/shoulder diameter of the parent?
Web, .522
Shoulder, .473
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  #93  
Old 09-18-2013, 10:17 PM
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Re: First custom rifle is here and i think its a keeper!!!!!

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Originally Posted by elkaholic View Post
A taper of .011" from the web to the shoulder is fine for that case. That is about what I run and have no extraction problems. It helps keep the case from stretching as much as does the 40 degree shoulder. P.O. was a little conservative......rich
So, as long as I keep the body taper around .010" I should be fine with extraction. Good, that's what I've been going with on all the ones I've designed so far.
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  #94  
Old 09-18-2013, 10:23 PM
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Re: First custom rifle is here and i think its a keeper!!!!!

I would give the case head a few thou, a case will head will expand very easily the first firing then settles down if you don't allow it a touch of room you'll have issues getting it sized down. I know guys who will just pull a reamer at the end of chambering with a tight reamer to give the case head just a little breathing space at the back to avoid some issues. All the reamers I own, are set up like this from Kiff, the first time I saw how much room was at the base on a custom reamer compared to the new case I was surprised but after firing then sizing down it become clear. Kiff will know what it needs if you get it roughed out and make sure you can make the brass.
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  #95  
Old 09-18-2013, 10:58 PM
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Re: First custom rifle is here and i think its a keeper!!!!!

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Originally Posted by MontanaRifleman View Post
Web, .522
Shoulder, .473
Wow! that is plenty of room to improve. Like I previously stated though, he will get quite a bit of length shrinkage.........rich
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  #96  
Old 09-18-2013, 11:47 PM
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Re: First custom rifle is here and i think its a keeper!!!!!

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Originally Posted by bigngreen View Post
I would give the case head a few thou, a case will head will expand very easily the first firing then settles down if you don't allow it a touch of room you'll have issues getting it sized down. I know guys who will just pull a reamer at the end of chambering with a tight reamer to give the case head just a little breathing space at the back to avoid some issues. All the reamers I own, are set up like this from Kiff, the first time I saw how much room was at the base on a custom reamer compared to the new case I was surprised but after firing then sizing down it become clear. Kiff will know what it needs if you get it roughed out and make sure you can make the brass.
It was Kiff that suggested to me to me to push the web in for reasons mentioned. I got this advise while planning for the 270 Montana
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  #97  
Old 09-18-2013, 11:58 PM
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Re: First custom rifle is here and i think its a keeper!!!!!

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Originally Posted by elkaholic View Post
Wow! that is plenty of room to improve. Like I previously stated though, he will get quite a bit of length shrinkage.........rich
Yup, I'm thinking a good bit of shrinkage
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  #98  
Old 09-19-2013, 12:53 AM
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Re: First custom rifle is here and i think its a keeper!!!!!

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Originally Posted by MontanaRifleman View Post
It was Kiff that suggested to me to me to push the web in for reasons mentioned. I got this advise while planning for the 270 Montana
He's never advised me to go that route, but then our goal may have been different as well. My first custom reamer I was hell bent to get a tight one, but was talked out of it by a couple BR smiths before even talking to Dave and that advice has stuck with me So far served me well but the next one I may have wished to go tight!
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