With some other powders, the Cheddite and the Win primers perform about the same. The best way to get the answer you need is to communicate with Alliant.

 

I can swap the two primers with no problems with my loads but there also in the 9000 to 9500 psi range.

 

No issues here. I load both primers and can't tell the difference.
I prefer Cheditte because I can buy them for $26.00 / 1,000

 

So i am trying to make the load that is highlighted the only concern i have is that i have cheddite primers and ive herd there compatible but i am not sure ? Will it increase the psi of the load using cheddite

There is only 1 way to get an accurate answer to your question rather than speculations and conjectures: carefully assemble 10 identical shells using each primer and send them to a ballistics lab like the one at Downrange Mfg. and have them tested for pressure and velocity to see what you're actually going to get when you load them. Them, if they turn out to be acceptable, load them exactly the way you did when you had them tested.

 

Mike,
You have asked the members of this forum for advise about safely swapping components for a load you like.
MAH66 has offered you great advise that you can follow without having to trust anecdotal information. In fact, if you follow his advise, you can confidently share the results with the forum and we all can learn form what you found.
You are obviously looking at data from Ballistic Products who have a good reputation for shotshell data. You might also give them a call to see what they say.
My only other advise to you is to rely on tested data, rather than the use of unpublished loads from other reloaders.
Good luck
John

 

I've shot tens of thousands of Cheddites. No issues and they're cheaper then Winchester which is what I use to load. I don't think I've ever had a failure with a Cheddite primer.

 

I don't think the OP is concerned about failure to fire, his concern is effect on the pressure of the load from making the substitution.

 

Most people that swap Cheddites in place of Winchester primers are loading lead shot you are trying to load Steel shot and that could throw the
pressures all over the place if you are only loading a few boxes for hunting I would buy the right primers if you are loading a large amount then
your better off loading some and have them tested.

 

I have the impression the OP is loading for target, it's a 7/8 oz. steel shot load.

 

No its a duck hunting load

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There's just not a whole lot of data for 2 3/4" loads using steel shot and Steel powder so it's hard to get a sense of how the powder behaves with various primers.

 

I was told from the guy i bought it from that they have the same burn rate

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It's inappropriate to be making general characterizations about primers and substitutions. Primers don't have a "burn rate" like powders do. Primers that appear to be "cool" with one powder can appear "hot" with another. It just doesn't work that way.

 

I emailed ballistics and this is what they replied back ....


We never recommend substituting primers, however if you choose to use a Cheddite primers in lieu of the Winchester you will probably see less pressure and velocity as the Cheddite primer is a ‘cooler’ primer than the Winchester.

The other thing to look at is the primer size (chart attached). The Cheddite is a larger primer than the Winchester. This may cause the primer pocket to be expanded and in the future may cause you some fit issues if you choose to go back to the Winchester primer forcing you to ‘resize’ all of the primers pocket.



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If I may ask, where do you get the Win209 for $120/5000? Best I have found is $135 + hazmat and shipping.

 

They will be at that price during BOTH the Michigan & Ohio State shoots.
Look for AJ's Supply.
NO HAZMAT - NO FREIGHT
Westcoast or Lowrence Shot - $34.99
This is how to buy reloading supplys!
MG

 

I have been using Cheddite primers for the past 9 years and have never had any issues with them.

 

Thank you. I am in Northern California so no decent deals on primers. Local stuff is expensive ($34.99 +tax/1k). Online is my only option but I have to catch a no hazmat deal and free shipping to make it worth while. Shot is closer to $50/25lb for new, locally. $25/lb for reclaimed.

 

If you are shooting them in a Krieghoff I would call Ernest Marlette and discuss those primers with him. Like most things,you are getting what you pay for which is a hard primer cup that's hell on firing pins in certain guns.

 

cheddites hard on tristar and browning pins... berettts is fine

 

Firing pins that hit on a angle seem to pierce Cheddites. I used them for 10 years but have switched to Win because I shoot old SxSs and don't want to have to have pins made for them. And I've never had a problem going to Win - the bigger/smaller primer complaint. They're the same size.

 

I've used cheddite primers for over 8 years. They have worked great....

 

Have used Cheddite exclusively for years, never a problem and I shoot Browning BT-99s, Remington 870 Trap and Remington 1100 Classic Trap shotguns.