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308 win and the berger 215

 
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  #22  
Old 10-11-2013, 06:35 PM
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Join Date: Jan 2012
Location: Houston, Texas
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Re: 308 win and the berger 215

Didnt get to phone lilja today. If i ask the gunsmith for a factory rem throat length will they know what i want? I dont know the actual number for the amount of freebore i have now or what i would need for the 215.

When you seated the 215 to 3.1", was 49gn a compressed load?
How far were the 215s jumping/jammed?

My gun is pretty heavy, i think i could tolerate a little more recoil. If it ends up being uncomfortable i can always build a brake for it. Ive been wanting to try that.

1fps/deg isnt that bad. I think i have .7 for imr 4064 but its hard to say. Sometimes that temp/vel ratio doesnt seem linear. Especially in texas summer.

Last edited by Canadian Bushman; 10-11-2013 at 06:44 PM. Reason: Typo
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  #23  
Old 10-11-2013, 09:57 PM
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Re: 308 win and the berger 215

I couldn't tell you what a gunsmith would or wouldn't know. If it were me, I'd include an inert dummy round with the bullet of choice seated to the desired oal, and ask the smith to throat accordingly. I'd ask for the bullet to be 10 thou' off the lands.

Another thing to consider is this. If the oal is too long, you may not be able to eject a loaded round without releasing the bolt stop. In my Rem's, 3.08" is about it in factory form. I had Wyatt's long mag boxes installed, and the boltstops shortened accordingly. That bought a little more oal latitude with ability to have a loaded round clear the front receiver on extraction/ejection.
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  #24  
Old 10-12-2013, 09:38 AM
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Re: 308 win and the berger 215

I think i will get some 215s and re17 to experiment with so i can send a dummy when its time to chamber the barrel. I measured my throat at about 2.325" last night i think saami spec is 2.302. This will tell me more after i get some 215s.

Quote:
Another thing to consider is this. If the oal is too long, you may not be able to eject a loaded round without releasing the bolt stop. In my Rem's, 3.08" is about it in factory form. I had Wyatt's long mag boxes installed, and the boltstops shortened accordingly. That bought a little more oal latitude with ability to have a loaded round clear the front receiver on extraction/ejection.
I have not considered this. Definitely something to think about. I know i can still eject my 185's at an oal of 3.05 but not sure how much further i can go.

When you seated the 215 to 3.1", was 49gn a compressed load?
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  #25  
Old 10-12-2013, 10:25 AM
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Re: 308 win and the berger 215

There was light compression with 49gr, and 215 at 3.10" oal. Not enough to mark the bullet tip with the seater.
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  #26  
Old 10-12-2013, 10:41 AM
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Re: 308 win and the berger 215

Thanks a lot Shane.
I know a whole lot more about what i want to do than i did a week ago.
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  #27  
Old 10-12-2013, 11:40 AM
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Re: 308 win and the berger 215

I have to take back what i said about the 215 not being marked on seating over 49gr RL17 at 3.10".

I went back and looked at the pic of the round in the linked 215 thread, and there is a slight but visible mark on the bullet from the seater. Compression didn't seem heavy though, as I recall.

One thing about using moly'd bullets is that if compression is heavy, the oal will 'grow' due to the reduced friction between the bullet and case. I didn't have any of that with the 215s over 49gr. That was in fireformed and neck-sized Win brass.
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  #28  
Old 10-12-2013, 02:33 PM
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Re: 308 win and the berger 215

I know its hard to say with so many unknowns at this point, but could we assume that 3.100" is close to if not minimum COAL to be used for optimal velocity, and charge weight. ?
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