I found about 2,000 M42-C1 primers in my grandfathers stuff. Googling has led me to a bunch of various MSDS and Military stuff but hasn't helped much. I did find this thread:

 

http://castboolits.gunloads.com/archive/index.php/t-178755.html

 

What should I do with them? Load 45 ACP and 38 Special? Sell them? Chuck them?

 

Keep in mind... I know very little about primers as I just got into loading. 

Sell them as collectibles?

I have decided to revisit these. I found a better link:

 

http://castboolits.gunloads.com/archive/index.php/t-53705.html

 

I'm really thinking about using them. I am considering using them for .38 Special and starting out with light loads and proceeding from there. 

 

I have been reading quite a bit about Small pistol primers vs SP magnum primers vs Small rifle primers vs SR magnum primers. I have read that using hard small rifle primers in low pressure pistol rounds can actually cause breechface erosion due to a poor seal around the primer because of a lack of pressure. Is there a way of telling that?

 

IF the primer material is harder than standard pistol primers, it might not show signs of overpressure correct? Because I could probably load SRM primers and show no signs of cratering or flattening out. 

 

I believe it would be safe with mild loads. I should probably invest in a chrono.

 

I have been reading quite a bit about Small pistol primers vs SP magnum primers vs Small rifle primers vs SR magnum primers. I have read that using hard small rifle primers in low pressure pistol rounds can actually cause breechface erosion due to a poor seal around the primer because of a lack of pressure. Is there a way of telling that?

 

 

I've used several thousand Remington 6 1/2 primers in light loaded 38 special. Never had any problems other than some light strikes due to the primers being too hard.

I still say sell them as collectables. I'll bet they are worth more to someone as an oddity then they are worth as a box of primers right now when primers are available.

here you go  http://www.winchester.com/SiteCollectionDocuments/pdf/msds/msds_w60.pdf

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CCgQFjAB&url=http%3A%2F%2Fwww.dtic.mil%2Fcgi-bin%2FGetTRDoc%3FAD%3DADA092511&ei=QEraVMrJJ9HtgwSU1IKQAQ&usg=AFQjCNE7Es5JDtk_neisuUKmPCozTlpIBA&sig2=3GDPs08gKtJsn8L2wjWbNQ

http://www.mil-spec-industries.com/Mil-Spec-Industries-Product-Details.aspx?ID=114779&prodname=M42C1&page=4

deleted, posted in wrong section

here you go  http://www.winchester.com/SiteCollectionDocuments/pdf/msds/msds_w60.pdf

 

So...according to this MSDS, this has the same chemical mixture as other Winchester primers? I can't find too much on the 34 and 41 primers, but the 1 1/2 and 8 1/2 are small rifle and large rifle primers respectively. The priming material is red on mine. Is it safe to assume these are NOT corrosive?

 

Since these are small rifle/pistol size, can I assume these are basically the same as Winchester 1 1/2 small rifle from the MSDS? I know that is a long shot and I should still proceed with caution when working up loads.

 

Vlad, I do appreciate your input. However, I don't think primers would sell well as a collectors item and I don't think I could break even if I were to sell these and replace them with new commercial primers. I also don't live near anywhere I can buy primers.