SRP vs SPP

[9mmPatriot]

In the last 10 days I've been able to buy 3k of SRP's (Rem 6 1/2). Since I'm heading to range today I loaded ten 9mm rounds with SRP.

Chrono results soon.

I've researched extensively and feel confident that these will work just fine, but the proof is in the shootin'.

If I don't post by early evening, my much better half will provide updates regarding recovery or a memorial....

 

[stansdds]

Oh, wow! Looking forward to reading the update... hopefully.
I doubt there will be a significant difference between the SPP and SRP primers.

 

[alwslate]

If you look for past threads you will see that this subject has been beaten about to death. Use your SR primers without fear.

 

[9mmPatriot]

Anyone want a horse-meat quarter pounder?

 

[SMSgt]

The only question will be does your firing pin/striker have enough oomph to pop the SRPs. Probably.

 

[9mmPatriot]

I'll throw in a "Hopefully" for good measure. If 10 out of ten work then I'll feel confident in my results.

 

[jjfitch]

This!

In the last 10 days I've been able to buy 3k of SRP's (Rem 6 1/2). Since I'm heading to range today I loaded ten 9mm rounds with SRP.

Chrono results soon.

I've researched extensively and feel confident that these will work just fine, but the proof is in the shootin'.

If I don't post by early evening, my much better half will provide updates regarding recovery or a memorial....

As mentioned previously here and just about every other forum use with confidence! Results will very due to the cartridge, powder and projectile. Use accepted reloading protocols when working up loads to avoid dangerous overpressure at max loads.

The main deference when selecting magnum and rifle primers is the brisance and cup hardness! The length of the "spark" initiated to efficiently ignite magnum powders like W296, H110 and 2400. And of course, the cup hardness for rifles.

Magnum and rifle primers have been used in standard pistol loads for many years in 9mm competition circles. As long as your gun will ignite via the harder cup you are good to go.

I my testing years ago looking to squeeze that last 1/2" smaller group size at 50 yards SMPP and SRP's 9mm yielded +/- 25 fps using medium burn rate powders. In some cases tighter S/D's some worse!

Now for the lawyers: Follow safe reloading practices and use only published load data. There I said it!

Smiles,

 

[The Norseman]

Primed

The Remington Primers should work good.
I have several Bricks of Remington and like
them.

Got several Bricks of Winchester the other
day for $20. I'm going to try them. I use
CCI all time.

 

[TjB101]

The Remington Primers should work good.
I have several Bricks of Remington and like
them.

Got several Bricks of Winchester the other
day for $20. I'm going to try them. I use
CCI all time.

Did you buy them from a widow looking to dispose of her late husbands stuff? Haven't seen a $20 brick in many years.

 

[9mmPatriot]

As expected, everything worked out fine....other than shooting a little fast for the Chrono. 9 shots recorded.

And with regular SPP (also Remmington, 1 1/2)

And a side by side of the primers, SRP on the left.

So we're on the same page, yes I know it's been covered.
No, I wasn't asking if my gun would explode or anything of the sort.
Simply posting my own efforts to confirm that using SRP's in MY RELOADS, in MY GUN would be safe and meet my expectations.

If you don't like seeing subjects repeated here (or anywhere), don't click on 'em. Problem solved.

 

[stansdds]

Thanks for posting your results. Just another confirmation that unless your revolver or pistol delivers light firing pin strikes, SRP can generally be substituted for SPP.

 

[glenwolde]

I'm curious about what powder you used?

 

[9mmPatriot]

Win231, 4.3gn

124gn MPR (RMRBULLETS.COM)

COL 1.065"

 

[STORMINORMAN]

Amazing that these real-world results are SO close: practically identical!

Or, if you prefer, for all intents and practical purposes, identical...?

Thanks! & Cheers!

 

[Paul in Nevada]

Identical velocity but noticeably lower ES and SD. I am guessing the harder cup results in more uniform primer ignition.

 

[9mmPatriot]

The mising 10th round screwed up the results.

 

[DWalt]

I have been using SR primers for handgun loads since the later 1960s. Still do.

 

[oldvette]

What is the mechanical difference between the two types which would cause the misfire in a pistol - thicker gauge metal in the SRP's? If so, would this affect the type and amount of explosive substance or anvil construction used to manufacture each type of primer?

Jack

 

[DWalt]

What is the mechanical difference between the two types which would cause the misfire in a pistol - thicker gauge metal in the SRP's? If so, would this affect the type and amount of explosive substance or anvil construction used to manufacture each type of primer?

Jack

Generally, the rifle primer cups are a little thicker than pistol primer cups to better withstand the higher chamber pressures of CF rifle loads. That has the effect of reducing the primer's impact sensitivity. There may be some cup metallurgy differences also, but I don't know anything about that. Likely there are only minor, if any, differences in the impact sensitivity of the priming composition. Allegedly, some military priming compositions are formulated to have lower impact sensitivity to minimize the possibility of slam-fires in automatic weapons. True or not, I cannot say. However, in the early days of the M16, slam-fires were an established fact. It was eventually resolved by making the M16 firing pins somewhat lighter, not by messing with the primer sensitivity. It was found that with using the original heavy M16 firing pin, making the primer sensitivity high enough to resist inertial impact of the firing pin on the primer had the consequence of making the primer ignition too unreliable for combat use. So by solving the slam-fire problem by making the primer less sensitive, another more serious problem was created.

 

[mmb617]

I also experimented with SRP in my M&P 9c, Shield 9, and a Ruger Security 9 a while back. All three had no problem firing with CCI #400 SRP's but none of them would fire reliably using either CCI #41's or BR4's.

That's just the results I got. Your results may vary. You won't know till you test.