16ga.com ~ View topic - Anyone try Alliant 20/28 powdwer for the 16 ga?

Checking to see if anyone has tried this in 7/8 or 1 oz 16 ga loads.
Thanks in advance.

Joined: 07 Jun 2020 Posts: 229

BPI in their Advantages 10th Edition have some recipes for Allianz 20/28

Mostly for Cheddite and Fiochi hulls and SG16 and BP Z16 wads.

Pressure generally are above 8000 PSI with most being above 9.5k

What manuals would anyone recommend for good load data?

Joined: 04 Mar 2019 Posts: 1844 Location: Central ND

Alliant and Hodgdon, but neither has 20/28 for the 16 gauge.

Even on the spreadsheets there isn't much data for 20/28.

Joined: 08 Feb 2009 Posts: 1311 Location: Western WA

Grafs lists 20/28 adjacent to Unique in their powder speed chart, so you might start there with some mild 7/8 oz loads. Plenty of Unique data out there.

B.

Joined: 07 Sep 2011 Posts: 567 Location: wheeling, wv

I have this load in my files, but it uses the hard to find DR16 wad.
Herters/cheddite 2 3/4' hull
20/28 17.3 gr
DR16 wad Ched 209 primer
1182fps @ 7420 psi
Tested by T Armbrust

I was going to drop the powder a bit and try it in a 2 1/2" hull and 3/4 oz.
Agree it would be nice to find one using Claybuster wads or SG 16.

I have not tried 20/28.

For 7/8 oz I have used Titewad & Universal fairly successfully with the SG16 wad, but I like 1350-ish fps. Universal will be hard to find, but there should be some Titewad out there. I used popcorn on top of the shot for those loads to get a good crimp, but would probably use airsoft pellets today, or a cork wad under the shot.

In 1 oz & above I tend to use Longshot with the SG16, and that should be easy to find.

More recently, in 3/4 oz I have been using Clays (hard to find), Clay Dot (somewhat easier) & Green Dot (fairly easy). I recently Chrony tested Clay Dot in the SG16 & CB078. The CB078 was about 60 fps slower for the same powder charge, and I needed a 28ga nitro card to get a good crimp. I use a 1/4" cork wad in the SG16 with some airsoft pellets on top for a good crimp.

what Brewster and 3Dogs said ...it loads about the same grainage as Unique , but what 3B alluded to - it is quite a bit denser than Unique . That's why the DR is such a help . The powder itself burns great and is robust .

Joined: 06 Jan 2017 Posts: 88

Joined: 09 Feb 2015 Posts: 824

My favorite load. 21gr. Comes out at 1225 to 1248 fps on crono I used. 1oz.

Member Joined: 30 Nov 2011 Posts: 1698 Location: Minnesota

3birddogs-I assume the Armbust load you mention is 7/8 oz?

Joined: 09 Feb 2015 Posts: 824

I got the recipe from the yahoo site.

Joined: 09 Feb 2015 Posts: 824

I got the recipe from the yahoo site. It's for 1oz.

Member Joined: 15 Mar 2007 Posts: 601 Location: Virginia

Alliant says 20/28 produces the same pressure as Unique by charge weight. It was formulated to be more dense because when Winchester went to HS hulls in the 28 gauge, they were shorter and the normal charge of 13 grains of Unique took up too much room. Any 16 gauge recipe for Unique can use the same charge by weight of 20/28. Stack height will not be the same.