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Accurate powder scale

 
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  #8  
Old 01-14-2012, 10:08 PM
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Join Date: Jun 2007
Location: Fredericksburg VA
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Re: Accurate powder scale

Mutt

get rid of the expander ball, change over to a straight decapping w/o expander. All of the die mftrs normally sell that setup as aftermarket conversion. Use an expanding mandrel to open the necks. I use the K&M mandrels as they match my K&M neck turners.
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  #9  
Old 01-14-2012, 10:47 PM
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Join Date: Dec 2011
Location: S.E. Michigan
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Re: Accurate powder scale

I'm a bit puzzled as to how someone can be so meticilous and not check case length as all bottleneck cases grow..... I keep a set of Starrett Calipers on the bench constantly........
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  #10  
Old 01-14-2012, 11:29 PM
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Join Date: Dec 2011
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Re: Accurate powder scale

Well...I am not as experienced at loading as you might think. The guy that got me into reloading died shortly after from cancer and there is a lot I have yet to learn. I clean primer pockets, chamfer and denier meticulously but he never said a word about case length (learned that in the past few days). Checking headspace...no idea how so I took it to a gunsmith. That is who told me this is the most low tolerance chamber he has ever seen. I can get on here and read about stuff but don't know anyone else who reloads that I can go watch and learn. As far as shooting...that is the easy part.
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  #11  
Old 01-15-2012, 12:15 AM
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Join Date: Dec 2011
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Re: Accurate powder scale

I have calipers and use them to check COL as I am loading but case length never was mentioned by my friend that got me started as it never was an issue until recently. Until just a few months ago, I reloaded for my AR15 and my 9MM. Have not had any issues whatsoever with them as I load fairly light in both. The 300 win mag is the first thing I loaded where it was an issue. Believe it or not, I have some .223 cases that I have reloaded as many as 8 times and they still have no stretch. I chamfer and deburr them and that along takes care of any small stretch that may have occurred.
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  #12  
Old 01-15-2012, 08:56 AM
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Location: Mountians of SW NC, near Asheville
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Re: Accurate powder scale

"...but for grins, I seek perfection. "

You need to check on getting a CNC lathe and turning your cases with better precision than they get stamped out by the present makers. Case variation has a bigger effect on our loads than .01 gr. of powder. Primers vary too but I don't know what to suggest for obtaining higher precision primers.
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  #13  
Old 01-16-2012, 08:52 AM
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Join Date: Dec 2011
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Re: Accurate powder scale

Well.....as I said, I switched from RL22 to H1000 and what a difference it made on the accuracy. The Savage just did not like the RL22 ( maybe it was the temperature variation issue with RL22. I started with 77 gr of H1000 and worked up in .2 gr increments. When I got to 77.9 gr, I started having issues with the sticky bolt again, but no other pressure signs at all. The MV with the 77.9 gr was 2977. I started backing off .1 gr at a time and decided to go with 77.6 gr. I shot five rounds with this load, and had MV from 2937-2948, which is the tightest group of MV that I have ever gotten loading the 300 Win Mag. All of these loads were using the Nosler E-Tip, so I am getting pretty close to the Winchester factory load specs of 2950 fps. I am pretty happy with this load, but still can't shoot this load as well as I can the Winchester XP3. Damn it all! I wish I could come upon a train wreck carrying those bullets and that powder. I would be shoveling it into the back of my truck for sure. I absolutely love shooting those XP3's but paying $54 for a box of 20 is sinful.
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