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chambering for 300rum for long coal?

 
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  #1  
Old 11-19-2013, 01:43 PM
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chambering for 300rum for long coal?

I plan on loading the rounds for my upcoming build with the longer bullets from nosler and berger and i was wondering if there is something specific I need to discuss with my Smith in regards to the chamber reaming?
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Old 11-19-2013, 04:27 PM
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Re: chambering for 300rum for long coal?

I would make it clear to the smith that you want the loaded rounds to fit in the magazine/clip and function in the action. Throat accordingly.
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Old 11-19-2013, 04:36 PM
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Re: chambering for 300rum for long coal?

I plan on using the Seekins dbm for 338 lapua if i can get my hands on one. I am having the stock inlet for it. That should allow a coal out to 3.9". Not sure what the loaded rounds length will be though....
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Old 11-19-2013, 04:53 PM
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Re: chambering for 300rum for long coal?

You need to load a dummy round (as long as you can that will still fit in your mag). Then send that to your smith and tell him you want it throated so that the rifling is .010 off the ogive of the bullet (or however far off you want)
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Old 11-20-2013, 09:36 AM
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Re: chambering for 300rum for long coal?

That was my first thought but the problem is how do I know what round the rifle or I will like best? I hate to have the chamber cut for a 215gr Berger and find out the 210 gr LR ACCUBONDS shoot better. I'm assuming the ogive of these two rounds are fairly different...
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Old 11-20-2013, 09:48 AM
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Re: chambering for 300rum for long coal?

Quote:
Originally Posted by dodgefreak8 View Post
That was my first thought but the problem is how do I know what round the rifle or I will like best? I hate to have the chamber cut for a 215gr Berger and find out the 210 gr LR ACCUBONDS shoot better. I'm assuming the ogive of these two rounds are fairly different...
This is the roll of the dice you take!
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Old 11-20-2013, 10:52 AM
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Re: chambering for 300rum for long coal?

I have had extraordinary luck with the regular Sammi spec chamber. The freebore is pretty long on it as they are designed. If it's not long enough just shoot a hundred rounds and check it again. The 300 Rum is hard on throats. If you build it extra long it won't be long and you will run out of magazine. Another good thing is both the Berger and the Noslers are very forgiving for distance off the lands.
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