I would think the CCI and Win or Cheddite primer would all pretty much be interchangeable. The CCI209M and Fed primers are hotter and would need about 1 gr less powder.

I have used the cheddite and Win primers and haven't changed anything else. I believe they are for all intent and purposes the same. My go to powder for the 28 has been Unique for 20 years.

No objections to the loads accessed from the sixties loading manuals. They probably won't blow your gun up. The date of the manual is my only objection. Fifty years later, loading information is available on the powder company websites. In the sixties, a recommended target load for 12 gauge was 23 grains of Red Dot. Today, it is about 17 grains. Do you see the problem?

For our old guns - yes.





.

I suspect it is foolhardy to assume that any powder has not changed some in a fifty year time span. Why not access current data.

Not too many years ago Alliant had numerous loads listed on their website using Green Dot for 7/8oz 20 ga loads. Today I do not think you will find one. Why? I have no idea.

I'll stick with currently published data thank you!

Gary, Bill & Dean,
You are all correct.
Somehow some of us old Geezers seem to keep doing things the same way as before and that does not make it right, but hopefully, the same at least for the most part.
Good advice. Thank you.
FYI: Both of my Parkers are Reproductions.
Steve

The 1968 Hercules Smokeless Powder Guide lists a 1 1/4 ounce lead load in 10ga driven by 29 grains of Red Dot with a "Cup type Over Powder Wad". With a Card Over Powder Wad it lists 31 grains.

Is there anybody out there who would shoot this much Red Dot with a 1 1/4 ounce load in 10ga, even in a fluid steel gun? I sure wouldn't.

Gary, "why" is because of wad configuration, hull construction, you name it. The bottom line is that powder companies continually test various combinations of all components. That's why we don't shoot 24 grains of Red Dot in 12 gauge target loads. Things change.

Am I remembering incorrectly that Remington shotshell primers produce up to 1000psi more than Win 209? With my .45-90 and 400gr cast bullets WLR primers produce 80fps more velocity than CCI equivalents. Anyone have any actual comparison data between Win 209 and CCI?

Richard. This is the best I can come up with:
http://www.armbrust.acf2.org/primersubs.htm