how to tell the difference between cci SRP and SPP primers?

[Kryogen]

how to tell the difference between cci SRP and SPP primers?

Winchester uses diff colors. Lets say I have a tray on the bench and I am not sure what's in, how can I tell?

 

[LUTNIT]

I believe pistol primers are shorter. Measure with a caliper and compare to labelled primers?

 

[stubblejumper]

The solution is simple, always store both primers and powder in their original container until you are going to use them.

 

[LUTNIT]

I just measured some CCI primers and they all came out to an average height of .120" so I guess that method is out. Large rifle, large pistol, small rifle, and small pistol are all the same height. There may be no sure way to tell in which case I wouldn't use them in pistol cases. I once mixed up regular and magnum rifle primers on my bench and didn't know which was which. I used them all in reduced powder cast bullet loads since those don't care much in my rifles. I would use the unknown primers in rifle cases with plinking ammo. The SPP's will probably give lower pressure but in a small rifle case it would still work; just not as consistently. I wouldn't use them in pistol cases as rifle primers could cause pressure spikes.

The solution is simple, always store both primers and powder in their original container until you are going to use them.

That is true but accidents happen and no one is perfect.

 

[stubblejumper]

The SPP's will probably give lower pressure but in a small rifle case it would still work; just not as consistently. I wouldn't use them in pistol cases as rifle primers could cause pressure spikes.

The SPPs are not made to operate at the pressures that most small rifle cartridges operate at, so using them in most rifle cartridges is not a good idea.

 

[LUTNIT]

Hmmm... forgot about that. I'd use them in cast bullet loads since they are very low pressure but not everyone loads those. SPP's seem to be safe up to at least 35,000psi (357 magnum) but I have no idea how far past that. 454 Casull reaches 50,000CUP but is meant to use SRP's.

 

[skip1600]

How many primers are you talking .. At the cost of them is it really worth any risk?

 

[reloader]

The solution is simple, always store both primers and powder in their original container until you are going to use them.

Agree with you 110% sir,That way no mishaps happen

 

[*MALICE*]

Measure the thickness of the cup. In theory, the rifle primers should be thicker

 

[Spawn-Inc]

I just measured some CCI primers and they all came out to an average height of .120" so I guess that method is out. Large rifle, large pistol, small rifle, and small pistol are all the same height.

incorrect.

large rifle primers are longer then large pistol. (LR = .127") vs (LP = .118)

however small pistol vs small rifle seemed to be the same size (.118)


if your unsure, use them all for pistol use.

 

[teenahlake]

unless you have issues with the primer being too hard, why not just go to SRP all the time?

 

[LUTNIT]

incorrect.

large rifle primers are longer then large pistol. (LR = .127") vs (LP = .118)

however small pistol vs small rifle seemed to be the same size (.118)

I'm just stating what I measured; I didn't look up any values. I measured 3 of each primer (SR, LR, SP, LP) from CCI and they call came out to .119" to .122" with most being .121". Hardly a large sample but that's what I just measured with a dial caliper.

 

[Spawn-Inc]

I'm just stating what I measured; I didn't look up any values. I measured 3 of each primer (SR, LR, SP, LP) from CCI and they call came out to .119" to .122" with most being .121". Hardly a large sample but that's what I just measured with a dial caliper.

All I measured was one of each primer. But I also know that when the 500 S&W canes out it used large pistol then later switched to large rifle. New brass says "LR" on it indicating large rifle. I find it funny they made them different sizes for large but small appears to be the same. Odd

 

[tjhaile]

unless you have issues with the primer being too hard, why not just go to SRP all the time?

That is pretty much it. Using a standard weight hammer spring, my CZ-75 works fine with S&B pistol primers, but has problems igniting S&B rifle primers. If your pistol does not have light strikes with rifle primers, it may be worth your while to standardize on rifle primers as a single small primer.

 

[sentian]

i spoke with CCI, the only difference between SPP and SRP is the C wall thickness. When i gave them batch numbers, they said the chemical makeups were the same. I know this because i ran out of SPP and now use SRP for my competition loads.

 

[*MALICE*]

i spoke with CCI, the only difference between SPP and SRP is the C wall thickness. When i gave them batch numbers, they said the chemical makeups were the same. I know this because i ran out of SPP and now use SRP for my competition loads.

Boom! I got it right on post 9. I'm awesome

 

[Kryogen]

sooo what does that mean?

 

[Spawn-Inc]

sooo what does that mean?

thicker cup, harder to set off, but the more pressure it can take before failing. assuming that's what you meant anyhow.