using small magnum primers

[nsdread07]

I've been unable to find any small pistol primers anywhere due to the panic and everybody buying up all the stock. I do have some small magnum primers and am thinking of using these for 9 mm. Should I start with a reduced powder load or use the recommended starting load for any given powder?

[Sasquatch-1]

I loaded up some 9MM and 38 spl with magnums. I think that the 38's were actually more acurate with 4.3 grns of Unique. Unfortunately the SR9 would not toach off the primers for some reason, so I don't know how they work in that gun. BTW, SR9 went back to Ruger yesterday.

As for your question I would start low (at least 10% below max) and work up with your particular firearm as you should do with any new load.

[winelover]

Recommended starting load should be safe with the magnum primers. Usually it's well under ten percent of the maximum.

Winelover

[Sasquatch-1]

Recommended starting load should be safe with the magnum primers. Usually it's well under ten percent of the maximum.

Winelover

It seems that the online data provided by the manufacturers of powder appear to be max loads. If this is wrong please correct me. I have been treating this info as max loads.

[ACrowe25]

I loaded up some 9MM and 38 spl with magnums. I think that the 38's were actually more acurate with 4.3 grns of Unique. Unfortunately the SR9 would not toach off the primers for some reason, so I don't know how they work in that gun. BTW, SR9 went back to Ruger yesterday.

As for your question I would start low (at least 10% below max) and work up with your particular firearm as you should do with any new load.



Your now the 4th person this month to send back a gun to Ruger that I know of... (other 3 are real life buddies). Hmm seems their QC is lacking.

But to the OP you should be okay at starting load. If your a bit nervous, back it down an additonal 10% and see where that puts you.

[mdi]

It seems that the online data provided by the manufacturers of powder appear to be max loads. If this is wrong please correct me. I have been treating this info as max loads.
When a manufacturer only lists one powder charge (not a min.-max.) it is usually the "do not exceed" load. Common practice amoung reloaders is to reduce the listed load by 10% and continue from there, if the charge is insuffecient/inaccurate.

[53caddy]

I have loaded my normal load of 4.5 grains of unique under a 125 gr cast booklet with small pistol magnum primers with no problem in a taurus pt92 and sig sp2009

[winelover]

It seems that the online data provided by the manufacturers of powder appear to be max loads. If this is wrong please correct me. I have been treating this info as max loads.

That might be the case but I get my data the old fashioned way---------out of reloading manuals that provide starting loads.

Winelover

[Sasquatch-1]

That might be the case but I get my data the old fashioned way---------out of reloading manuals that provide starting loads.

Winelover

My problem is I haven't bought a new loading manuel since I started reloading. I use the online stuff just to make sure I am not over doing it with powders that the formula might have changed slightly.

[3jimbo3]

I used magnum primers with 4.6 gr of unique in my 9mm with excellent results. My question??? Has anyone ever used small rifle in a small pistol? I know rifle powders differ from pistol powders but are they different? Just wondering

[Edubya]

See this similar discussion on: http://castboolits.gunloads.com/showthread.php?190743-38-special-load

EW

[OutHuntn84]

I used magnum primers with 4.6 gr of unique in my 9mm with excellent results. My question??? Has anyone ever used small rifle in a small pistol? I know rifle powders differ from pistol powders but are they different? Just wondering

I've been asking the same question about using small rifle primers in pistol cases. Anyone already tackle the R&D yet?

[km101]

I have interchanged Std and Mag primers on many small pistol loads. Just do not use them at or near max. Stay at least 10% under max and you will be fine.

As far as the Small Rifle primers in pistol loads; it is not a good idea. The primer cup on SR primers is made of a harder material to withstand rifle pressures. Some pistols or revolvers may not have a hard enough hammer strike to ignite the RP. And you will not know until you try it in each gun. Probably not worth the hassle.

[OutHuntn84]

Thats kind of what I was thinking on the primer cups. Valid point on the hammer strike, Thanks!

I was hoping an explenation would curb my curiosity... lol

[destrux]

Edit: Nevermind everything I just typed, my friend was using small rifle primers...

Anyway, here's a chart detailing the cup thickness and some info about all the various primer brands/sizes

Notice the CCI SPM and SR are supposedly the same primer, according to CCI themselves.

http://www.sksboards.com/smf/index.php?topic=56422.0