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Segregating .338 SMKs 300gr What priorities?

 
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  #1  
Old 01-28-2007, 10:19 AM
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Segregating .338 SMKs 300gr What priorities?

I want to start segregating my 300 gr SMK's. I have 1000 of them.
What are the best priorities? These will be used in my 338AM this summer.

Bearing surface first ?
base to ogive second ?
Other measurements ?

For each of the above measurements, how large should the group be? .001"?

Once they are segregated, then I will weigh them all to find any 'out of norm' weights. I weighed a bunch and they were all from 299.9 - 300.1.

Thanks,
Don
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Old 01-28-2007, 07:18 PM
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Re: Segregating .338 SMKs 300gr What priorities?

I tried that and it got real boring real fast. Weights were as you stated so forget that.

I guess I'd go with bearing surface only but that is a bit of a bother. So maybe base to ogive.

Short answer though, is just shoot 'em.

In my RUM and US-869 I'm getting single digit ESs which seems to be what's important as the groups can't get any smaller and am using just 'out of the box' SMKs.
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Old 01-28-2007, 07:45 PM
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Re: Segregating .338 SMKs 300gr What priorities?

What Roy said , times 10

especially that " just shoot em part "

Jim B.
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Old 01-28-2007, 08:21 PM
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Re: Segregating .338 SMKs 300gr What priorities?

But he don't got no gun! All he has got to play with is boollits. [img]/ubbthreads/images/graemlins/grin.gif[/img]

Poor AJ will be crazy before Kirby gets his gun built.
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Old 01-28-2007, 08:34 PM
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Re: Segregating .338 SMKs 300gr What priorities?

Bearing surface measurements pick up 99% of errors.
Base to ogive measurements pick up probably 97% of errors.

If you have a way to measure by bearing surface, it is best and will negate having to measure base to ogive for the most part.

I segregate all my bullets (including the incosistent 300 grain MK's) into piles of .001" variation and then load and shoot them in these batches.

Weight on your batch of MK's is the best I've ever seen for the 300's. I wouldn't worry about it.
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Old 01-28-2007, 09:06 PM
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Re: Segregating .338 SMKs 300gr What priorities?

I agree with GG. If you guys will get two ogive noses from Sinclair, they make an excellent bearing surface measuring device.

Just as an example the Berger bearing surface and the Wildcat bearing surfaces on the 210gr 30 caliber bullets are within .003" of each other on the batches that I have.

Anyway, it is very quick to measure them.

James
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Old 01-28-2007, 09:14 PM
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Re: Segregating .338 SMKs 300gr What priorities?

Don don't waste your time with those big old long bullets send them to me and I'll sort them out for you LOL Tod [img]/ubbthreads/images/graemlins/grin.gif[/img]
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