"RP 357 Magnum" Nickle Plated - Brass

[renaissance]

Came by a batch of > Headstamp = .

Tried to reload it on my 650.

All kinds of problems.

Hard primer seating - Sideways and upside down primers - Hard sizing - and >One Primer detonation on seating.

I had previously just finished a batch of mixed brass ( No nickle) without any problems.

Does "RP NIckle 357 Mag" by any chance feature "crimped primers" ?

 

[Bula]

Nope, standard small pistol primer pockets. What kind of primers are you using?
Try WSP they work for me.

 

[Shoney]

In over 46 years of reloading, I have never had a primer detonate in the press. I have loaded them upside down and deprimed them without incident. I've loaded them sideways, partially crushing them so that the shell could not be removed from the shell holder, and had to deprime them, and did so without detonation. They take a very heavy blow, not a slow steady force to detonate.

What dies are you using?????????
What style of seating do you perform????

Please post info so we can more accurately diagnose the problem.

Also, the 650 is notorious for priming problems, especially when they are not clean and come out of adjustment. Or it may be that you have the wrong shell plate in, causing the case to be off center.

 

[renaissance]

Not "RP" >> "AP"

I was taking micrometer readings of the "RP 357 Magnum Nickle plated" brass that was giving me problems.

Trying to figure out what might be "different" about it.

On closer Examination:
The Headstamp says "AP"......not "RP"

Armor piercing ???? I dont think so.

Noticed that the cases that got "wrecked" dis NOT appear to be "Flared" properly.

The NIckle brass dis not appear to be appreciably shorter than the Brass Brass....Checked my flaring adjustment....It was not loose

I think I will go with "Smokey's " Sage advise

Not to dwell on why....Just chuck it an go on with life!

But I AM Curious....................... "A" P ??????