10MM primer comparisons

[RickShooster]

I'm taking this posting down due to safety concerns.

[Kenk]

I?ve wondered about this as well, Thanks Rick!

[Kenk]

Was just thinking about something from a few years back, unless I?m mixing it up with something else. Aren?t LG rifle primers slightly taller than LG pistol? If that?s the case, they may not seat at the correct height, possibly sitting a hair higher than they should

[John A.]

Was just thinking about something from a few years back, unless I?m mixing it up with something else. Aren?t LG rifle primers slightly tall than LG pistol? If that?s the case, they may not seat at the correct height, possibly sitting a hair higher than they should

Yep.

Shouldn't use a large rifle in a large pistol.  Slam fires could occur.

From everything I have seen, you can interchange small rifle in a small pistol, however, in some instances, they say you could get light strikes on some guns, but you'd have to check with the gun.  Some hammer springs have weakened over time.  Some have been replaced with lighter springs to reduce pull weights, etc.

But, the large rifle are too long to seat properly in most large pistol cases.

[The_Shadow]

Primer size charts from SAAMI

[Kenk]

Great info, Thanks Shadow!

[RickShooster]

For whatever it's worth, probably not much, I am able to seat the LR primers with my hand priming tool so they are flush with the head and I check every round when I seat the primer by placing it on a flat surface.  If it doesn't rock and stands solid, it's flush.  You can further check that by running a straight edge across the bottom, if it doesn't hang up, it's flush.  But that's just me.  I'm not recommending any particular practice to anyone.

[Kenk]

From what I?ve read today, it sounds like if you can get them seated properly (as you?ve done) it should work fine, haven?t seen anything else that could be problematic, not that there isn?t

[RickShooster]

John A. above says that LR primers shouldn't be used in pistol cases as they can slam fire.  That's all it took for me to walk away from the whole thing.  I don't want to have anything to do with something that can cause unintentional firing.  Lawyers can be snakes.   We all know primers should be seated flush or slightly under flush in any ammunition loaded. You never want primers sticking out for a number of reasons, for one thing, they can keep a slide from locking into full battery, for another, they can stop a cylinder from rotating, cause a slam fire in some guns, cause feeding or magazine problems, they can also jam up a progressive press and hang up in a shell holder, etc.  But for my own well being I should probably keep my ideas and information to myself.  Lawyers and prosecutors these days see everything and anything as a source of liability and I want none of it.

[Kenk]

For sure, there are enough variables to consider when using the correct components, let alone adding in the guest work of something that could be questionable or potentially dangerous

[John A.]

I really hope that you aren't upset that I said anything.  That wasn't my intention.

I never thought about it either until all this shortage crap has came along again and I started looking into for myself, and for the same reasons you have to be honest. 

But, that's the info that kept coming up because large rifle primers are a little longer than large pistol primers.  For that alone, is why they may stick out too far and cause problems.

[sqlbullet]

If it was a zombie apocalypse and I was in a reload or die situation, I would not hesitate to load LR primers in pistol if that was needed.  Of course, typing that I can't help but wonder in that circumstance why I wouldn't load rifle rounds since a rifle is a better tool....

The current situation is a great example of why too much is often never enough.  I headed into this mess with around 25K primers.  I still have thousands, but I can see the bottom of the barrel with some types, especially pistol primers.  I am hoping I can restock soon, as I am seeing occasionally that people are finding them to buy. 

[RickShooster]

I really hope that you aren't upset that I said anything.  That wasn't my intention.

I never thought about it either until all this shortage crap has came along again and I started looking into for myself, and for the same reasons you have to be honest. 

But, that's the info that kept coming up because large rifle primers are a little longer than large pistol primers.  For that alone, is why they may stick out too far and cause problems.

No, we're good.  I remember reading the  same thing and I just kind of forgot about it.  It is not an easy thing to seat those primers.  In a lot of cases, it probably can't be done and that creates a hazard.  It's too bad that this situation with reloading supplies exists.  I think the anti-gun establishment is not helping anything with their policies and actions.  They are constantly scaring people into impulse buying things and it's generally against their own anti-gun sentiments.  e.g., Joe Biden says he wants to ban AR-15s.  What do people do?  They run out and buy an AR-15.  They also buy ammunition, maybe even a press and reloading supplies.  These constant threats against the 2nd Amendment create these hoarding and supply shortage situations, at least that's how it looks to me.

[Kenk]

I was over buying ammo and reloading components prier to the pandemic, now when I look at primers, it just kinda makes me sick to my stomach.

[crkckr]

Pressing LR  primers into a pistol case has more potential problems beyond getting a potentially high primer!  If you press a rifle primer into a pistol case hard enough to keep it below the level of the case head it is possible to crush the cake (priming compound) which could make it fall out of the cup into the case with the powder, turning your cartridge into an instant dud!  If you could get everything to work without causing problems the rifle primers would work - with mid range loads!  However, if you are working with top end, max pressure loads (and who loading for 10mm isn't?) you must start at those mid range loads and work up very carefully towards the top end.  If you take a previous max load with a standard or mag pistol primer and suddenly substituted a rifle primer it could very well drive the pressures over max!   It might not be noticeable without a chrono until you start getting case bulges or difficulty with extraction... or until things break.
Cheers,
crkckr