All manufacturers quality control by random sampling. Pressure and patterning are key tests. They also know their cartridge pressures. Sales people may not know but the engineers and QC people do.

Lots of cartridges from the major manufacturers fall below Parker max service loads. It’s when loads are heavy , the 1 1/4 and 3 1/4 dre stuff, that pressures exceed max. No Black Cloud Prairie Storm hyper magnum stuff, that you don’t want . I don’t think there is a 12ga 1oz, 2 3/4 Dre or under 1200 FPS load that isn’t acceptable . If there is, I haven’t seen it.

You want the stuff that doesn’t cycle a recoil driven auto well.

They know. Most just wont tell you. Other than referring to SAAMI.

It's a "legal" thing.





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RST will tell you pressures. You can go to Hodgdon or Alliant web sites for loads, but I find it much easier to use one of their reloading manuals which are free for the asking. As Bruce said, 1oz loads are your friend at or under 1200fps, and there are many many of them. Most of us like something under 7500 or 8000psi out of respect for the wood. Go to our reloading forum for more info.

Kent non-toxic 12g (2016)
Bismuth 2 1/2” @ 1400 fps 1 1/16 oz. - 9800 psi; 1 1/8 oz. - 10,000 psi

Tungsten Impact 2 3/4” @ 1400 fps, 1 1/4 oz. - 9900 psi; 1 3/8 oz. - 11400

Kent Bismuth® Premium Upland 2018
2 3/4”, 1 1/16 oz., 1325 fps, 10,000 psi

Kent Bismuth® Premium Waterfowl 2018
2 3/4”, 1 1/4 oz, 1325 fps, 10,800 psi

More factory pressures at the bottom here
https://docs.google.com/document/d/1...UOZEFU/preview

BTW: very few Parkers haven't been shot with some Super-X boomers. Check these pressures
http://www.doublegunshop.com/forums/...&Number=543522

Back when I first started reloading in the late 60s it never dawned on me to use a scale to weigh powder drops. I think most guys just put in the recommended bushing. Today it's kind a understood that you should weigh the charges. The bushings are just a starting point seeing how everyone's mechanics are a bit different. Digital scales are quite cheap - $30 or so.

The powder companies' booklets and their websites give you "published loads" which is what you should be loading, unless you have tested loads from other sources. RST has a file cabinet full of loads that have been pressure tested, and they will share that information with you. They continuously test existing and new loads and insert the results in their files. If you ask about a load they sell that they do not have in their files, they will shoot it in their test guns and tell you what they find. It is all done at their factory office, which has a firing range within a few feet of their computers and desks. I know, hard to believe, but that's the way it is.

Austin Hogan visited RST in 2010 and interviewed Morris Baker and Alex and Jill Papp and wrote a great article for Parker Pages Fall 2010 Issue, titled "Parker Pages Visits the RST Classic Shotshell Company" and you can very easily find it and read it in your very own "Parker Pages Digital Archive". But, as Austin sometimes did, he didn't include a by-line so you'll need to search for the article (with excellent pictures of the RST operation) by its title.





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Hey everyone I wanted to forward the information that I received back from Kent and I hope this helps everyone out.


Here is what we have
B12U30 model is the 1325 fps and its psi is shown at = 10,800
B12U36 is 1350 fps and it shows a psi at = 10,100
Hope this helps!
Have a great day,
Kent Cartridge Customer Service