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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Tue Dec 14, 2010 8:30 pm 
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Location: Knoxville, Tn area Nyuck, Nyuck
I remember Alliant saying to reduce the HS loads by 1/2 grain.



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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Tue Aug 20, 2013 8:27 am 
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Joined: Sat Feb 05, 2005 4:51 pm
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Location: Phoenixville PA
Just e-mail or call the Alliant help line. You should get some able assistance. (Info is on the Alliant web site.)

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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Fri Aug 23, 2013 9:29 am 
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Joined: Sun Mar 13, 2005 6:00 pm
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Location: Shanghai, Seattle & Sydney
I found the No 16 mec bush gave me about 12.7 gr of 20/28 using a brand new 28g grabber and a red powder baffle. Maybe it's just me but I was surprised just how far out it was. So off I went with a drill and a polishing stone and opened the bush up till I got the charge I wanted. Maybe they stamped the wrong No on the bush either way it's wise to check check and recheck.


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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Fri Aug 23, 2013 9:45 am 
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Joined: Wed Dec 09, 2009 3:09 pm
Posts: 6403
Location: Eastern Nebraska
westwind wrote:
I found the No 16 mec bush gave me about 12.7 gr of 20/28 using a brand new 28g grabber and a red powder baffle. Maybe it's just me but I was surprised just how far out it was. So off I went with a drill and a polishing stone and opened the bush up till I got the charge I wanted. Maybe they stamped the wrong No on the bush either way it's wise to check check and recheck.

This sounds to pretty normal to me. Bushings almost always drop some what under what the chart says. The chart says 13.8 for a #16 and you are getting 12.7, basically a grain light. The chart also says it is closer for single stages and that progressives tend to drop lighter charges. A grabber is a progressive press. It might not have auto advance, but it is progressive.

If someone asks me about bushing selection I typically tell them:
For a single stage START with what the chart says, do some drops and weights and go from there. You will probably end up going up one size.
For a progressive start one size up from the chart, drop, weigh, go from there. You will probably end up two sizes up from the chart.

If I tried a #16 and it was dropping about a grain less than what I wanted, I would try a #17. I would certainly try this before drilling reaming.


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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Mon Nov 04, 2013 6:40 pm 
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Joined: Mon Feb 27, 2012 7:01 am
Posts: 87
Location: Western N Carolina
I checked the MEC bushing chart but that mice type is getting harder and harder to read, I was able to get the #15 bushing number though. Since it seems they always throw a lower charge than what is listed surely someone would have some real time experience of what bushing would be closest to 13 grains. Sure enough the number 16 bushing sounds like a good place to start, we're getting a delivery from Gamaliel so I'll add the #16 to my order and probably a #15 and #17 to cover my bases.
Thanks again.
Jim


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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Sun Mar 23, 2014 2:36 pm 
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Joined: Thu Aug 19, 2004 10:54 am
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Location: Western Carolina - foothills to the Great Smoky Mtns!
Topic bump (fer the good of the order!)

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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Sun Mar 23, 2014 6:24 pm 
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Curly,

first of all you are sick to spend your time doing this LOLOLOLOLOL!!!!

That said, here are a few of my bushing numbers for 2028, on my MEC 9000 Automate after 10 initial dumps, 5 dumps averaged:

17 >> 13.5 (my goto for 28ga)
17- this was a 17 that initially threw 13.2, so I reamed it a little and it now throws 13.8

21 >> 16.0 (my goto for 20ga)
22 >> 16.7

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Last edited by JacksBack on Mon Mar 24, 2014 6:35 am, edited 1 time in total.

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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Sun Mar 23, 2014 9:24 pm 
Crown Grade

Joined: Thu Aug 19, 2004 10:54 am
Posts: 2147
Location: Western Carolina - foothills to the Great Smoky Mtns!
Wow, 13.8 of Alliant 20/28 seems a tad 'hot' to me for 28ga, based on all the 28ga recipes I've seen for 20/28 (but then again, I ain't seen em all! :s

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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Sun Mar 23, 2014 9:52 pm 
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Joined: Sun Mar 13, 2005 6:00 pm
Posts: 331
Location: Shanghai, Seattle & Sydney
Have a look on the alliant website they have loads up to 14.1 of 20/28


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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Mon Mar 24, 2014 3:53 am 
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Joined: Fri Feb 24, 2006 12:28 pm
Posts: 615
Location: Wisconsin
I'm not Curly and I probably have less hair but I do own a Spolar. The #16 bushing would be a perfect place to start but because of the vibrator you may or may not get the same results. I use Hornady bushings and drop 13.3 gr. of 20/28 in my 28 ga HS hulls.

Do you know what powder the 28 ga tool head was set up to drop? You might have to adjust your wad depth, pre and final crimp dies if it was set for the short HS hulls.

Concho, just curious as to why you had an adapter made for Mec bushings, did you already have some Mec bushings when you got your Spolar?


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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Mon Mar 24, 2014 9:22 am 
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Joined: Tue Dec 14, 2010 7:34 pm
Posts: 44
A friend of mine made the mec adapter (free). I have a large supply of mec bushing as I had mec presses prior to getting the spolar. The hornady bushings are more expensive than the mec's.


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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Mon Mar 24, 2014 10:24 am 
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MEC bush to Spolar/PW/Hornaday adapter: http://www.ebay.com/itm/MEC-Powder-Bush ... 1396083402

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 Post subject: Re: Alliant 20/28 or 2028 powder and Mec Bushings +PW
PostPosted: Sun Mar 14, 2021 3:03 pm 
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Joined: Wed Jun 30, 2004 2:03 pm
Posts: 977
Location: Western West Virginia
Thanks Curly. I will scale them to be within formula tolerances. for 20 and 28 loads. Case would be so proud of us . thehoner.



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