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I am a straight from the Alliant powder catalog loader. It seems all the 20 ga recipes are "high." Off the cuff they are 9500-11000. Any one have a recommendation in the 8k range? USING GREEN DOT OR 20/28 powders? I have generally unlimited hulls and will buy wads if needed.

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Check your PM's


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Ballistic Products, Precision Reloading....Google is your friend:)




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Might be worth 20 bucks or so delivered to obtain the Advantages Manual from BP. I noted more than a handful of 20 ga. recipes under 8k. You would have to think about another powder, however.

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Would someone on the board share with me what exactly constitutes low pressure for a 20 ga.? I'm loading for a friend that owns a 1920 something 20 ga. English s/s. I trim the hulls to 2.5" and use Hartin crimps with Ballistic Products loads that are in the 8-9k range. Not positive I'm doing it right, but beats hell out of the 2.75" promo loads he was using. As most likely know, 20 ga. factory loads o/t RST type tend to be hell for stout, 10-12K.

Steve


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To the OP; you will need to change powders for really low pressure 20 ga. loads. Probably the best single powder for that purpose is IMR 800X. If you go to Hodgdon's website [they either own IMR or are the sloe distributors now], you will see virtually every 20ga. recipe w/800X meets the 'low pressure' criteria for 7/8 oz. loads using it.

I would recommend you stay with the 7/8oz. shot weight and if you want more 'thump' to use a larger sized shot/pellet. Also if you do a lot of surfing/reading on that powder you will find some remarks about it not metering well, in some loaders. Most all that kind of remark fails to make any mention of that last qualifier and had to do with some progressive loaders & how they were set up rather than there being anything specifically wrong w/the powder. There isn't. I have loaded quite a bit of it over the years using a single stage MEC and NEVER have had any issue doing so. I mention that only because I would not wish to see you discouraged when it will do exactly what you are wishing to do, perhaps better than any other powder presently available.

kind regards, tw

Last edited by tw; 03/18/16 09:25 PM. Reason: spellin'
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Appreciate all the help folks.

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My standard 20 G target load, for a Parker Trojan, is the lightest published by Alliant Powder.

AA Hull 14.5 20/28 3/4 oz Shot. Clay Buster 1075-20 wad 7,200 lbs @ 1200 fps. Weighing # 8 shot thrown by my 3/4 oz bushing it's a bit lighter than 3/4 oz which should reduce pressure even more.

2nd 20 G load, for a Parker 20 G Hammer gun, Stock wood is suspect so I want less recoil and it's only used on Clay targets at modest range. All same except I go one powder bushing lighter. Weighs at 13.7 Grs. Recoil is lighter than the 14.5 load & performs well on clay targets. No sign of unburned powder residue.

Few side notes. If you are not sure about unburned powder run a patch through the fired bore. Safe place set the patch on fire. any unburned grains will Fizz, obvious it's unburned. No fizz you are burning all the powder. Cold weather to warm could make a difference working on the low edge of burn rate.

AA Hulls are shorter than Remington. I get them at 2 11/16 inch. They are fine in my chambers. Yours may be different, measure and be sure before you use hulls too long which will increase pressure.

Last 3/4 oz is plenty of shot for targets and probably the best way to reduce recoil and pressure , Most of the time I go to a twin of the Parker Trojan in 16 G when I want 7/8 oz. But in the 20 G Trojan Alliant's published 7/8 oz load using AA's and the CB 1078-20 @ 9980 lbs is a mild shooter.

Boats

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I believe the pressure on the Gamebore low pressure 20ga loads is 7,657 PSI (I can no longer find my source for that)

There is at least one 1oz load at 7,700 PSI with longshot powder that can be found on the Hodgdon site.

I believe in general you should stick with 7/8 loads for most low pressure 20ga loads.

PS any 2 3/4 20ga data is good for 2 1/2 if it fits and most 7/8 loads do

Last edited by old colonel; 03/18/16 10:09 PM.

Michael Dittamo
Topeka, KS
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