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Old October 5, 2021, 09:44 AM   #1
mehavey
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1/2-oz 12 Gauge (for the Search engines)

Just playing on the skeet range for the last 9 months -- decide to take the shot weights down.
Hodgdon & Lyman have good Load references, so I walked it down: 1⅛, 1.0, 7/8, 3/4, ... things shot so well-balanced with the 12ga Beretta O/U that I thought I'd take it down to duplicate where my Beretta 410 was as well -- only with better "mass" in swinging up/over on Low Gun.

Only no data -- at all -- for 12Ga_½oz

"The Internet" came up with just duplicating mid point 3/4 oz data for the components (AA/Fiocchi616/Claybuster-CB0175-12/700X/15gr), and putting a felt wad-spacer in the 3/4-oz shot cup.
(Felt was more trouble than it's worth. I settled on using a 1/8" card)



FailSafe -- same powder load, but lighter projectile.
Worked/shot well over about a week-10 days

Decided to save my 700X supply and look for other powder options.
Hodgdon listed that same 3/4 oz load for 700X, Clays, and TiteWad.
I had a coupla pounds of Clays.
Same game: Mid 3/4 oz Loadout (16.9gr), but with lighter projectile (1/2 oz)

AHEM:
A bit of a surprise -- and had to walk it down... "quite a bit"



Chronographs are your friend.


WARNING: My Beretta/Shotgun, the exact components listed, and my dusty old (but still very reliable) Oehler-35.
Your mileage may vary.

Last edited by mehavey; October 5, 2021 at 09:50 AM.
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Old October 5, 2021, 12:44 PM   #2
stinkeypete
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Very impressive work. Thank you for posting!

Perhaps the most impressive thing is that you didn't shoot your chronograph with your shotgun. I've shot mine several times.

The versatility of a shotgun continues to impress me, and reminds me why I keep that old single shot Stevens in my gun safe. From squirrel to deer, it can do it in a pinch.
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Old October 5, 2021, 03:02 PM   #3
Jim Watson
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Interesting path of development.

Let us know how a half ounce 12 gauge patterns and breaks targets compared to a .410.
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Old October 5, 2021, 06:02 PM   #4
mehavey
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The patterning board doesn't show big difference in 23yd/skeet chokes effect between the two Berettas (12/410)
But the 12ga's mass is much more comfortable in swinging into/with the birds.

Adding to the data tonight since I've now got to live w/ a dog's breakfast in primer stock:
Relative/Probable peak pressure effect at far right:


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Old October 6, 2021, 10:37 AM   #5
MarkCO
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Nice work.
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Old October 6, 2021, 12:43 PM   #6
FITASC
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I can say that my 3/4oz 12 gauge loads absolutely crush targets when I tighten things up at least one constriction from what I would use with a 1oz load
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Old October 6, 2021, 07:20 PM   #7
stuckinthe60s
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it seems like a lot of work. but hey, its the joy of being American, I guess. bravo.
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Old October 7, 2021, 08:48 AM   #8
Seedy Character
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I've loaded a lot of the 3/4 oz loads. Great for teaching young, small frame or recoil sensitive shooters. Great for Cowboy Action, too.
Plus, the slight savings on shot and powder.

I may have to give 1/2 oz a try
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Old October 7, 2021, 10:19 AM   #9
FITASC
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Not slight savings, especially compared to a 1oz or 1-1/8oz load. The shot savings are substantial. The reduction in recoil lets me shoot 300-400 rounds in a day; even through my Beretta gas guns
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Old October 7, 2021, 10:32 AM   #10
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OP- I wonder if it would be easier to place the filler cards over the shot instead of under?
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Old October 7, 2021, 03:51 PM   #11
mehavey
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Actually, just dropping the card into the shot cup, and then seating the shot cup as normal
followed by shot drop, seems the simplest method. Produces normal crimp.

Also, doesn't leave anything in front of the shot column to decelerate back through the
pattern as things exit the muzzle.
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Old October 12, 2021, 10:23 PM   #12
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Food for thought about the wad placed atop the shot and the possible problem of the wad decelerating through the shot column and disturbing the pattern.
I shoot muzzleloading shotguns during hunting season. There is a much discussed loading in MLing circles. It is called the “skychief load”. It produces very nice patterns in many shotguns. The load places a well lubricated cushion wad atop the shot charge in lieu of the traditional overshot card
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Old October 13, 2021, 06:56 AM   #13
mehavey
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Quote:
well lubricated cushion wad atop the shot charge in lieu of the traditional overshot card
I'll have to try that with the Brown Bess at the skeet range.
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