6.5CM Small primer vs large primer brass

[OTG8]

I have some once fired factory brass and noticed some brands (Federal premium) use small primer pockets and some used large primer (Sako, Sierra).
Wondering if there could be some noticeable differences between velocities and extreme spread or not a factor?

 

[remington jim]

The real benefit of SRPrimers in std head size brass is longer life of the brass due to less expansion of the smaller pockets .
Velocity etc are usually very similar .
Your better of with LRP in colder weather and MAGNUM LRP in
the REAL Cold !

 

[todbartell]

Your better of with LRP in colder weather and MAGNUM LRP in
the REAL Cold !

Any test data available to back this up? I've shot SRP 6.5cm down to -19c with RL26 and CCI450 primer and had no weird ignition or unusual high SD

 

[remington jim]

Any test data available to back this up? I've shot SRP 6.5cm down to -19c with RL26 and CCI450 primer and had no weird ignition or unusual high SD

NO and i not saying there is a problem - but Ron Spomer Says So. . CCI 450 is a MAGNUM primer

It’s a FACT there is more powder in a LR primer and also a FACT that LR Magnum have more powder with a longer TIME !
This info from CCI. !

 

[DaedalusX]

I absolutely had problems with 22Creed with SRP and N555 in cold and camp weather but never had problem with 4831 and 6.5 creed with SRP.
Both loads were CCI450. If I was hunting I wouldn’t take the risk.

 

[adamg]

My buddy had a few SRP 6.5CM that failed to ignite in the winter at like -30C.
He pulled the bullets and some of the powder was visibly scorched, so the primer definitely ignited.

 

[remington jim]

My buddy had a few SRP 6.5CM that failed to ignite in the winter at like -30C.
He pulled the bullets and some of the powder was visibly scorched, so the primer definitely ignited.

BUT not enough fire power to get it all BURNING ?

 

[todbartell]

I've had the fizzle scorch with H110 & standard SRP in a 450 Bushmaster, I believe the powder wasn't up against the flash hole when primer ignited

 

[track]

The real benefit of SRPrimers in std head size brass is longer life of the brass due to less expansion of the smaller pockets .
Velocity etc are usually very similar .
Your better of with LRP in colder weather and MAGNUM LRP in
the REAL Cold !

It does make sense to use a LRP for colder temperatures, best to be proactive and preventative. To add a guarantee, use Federal primers. One day I'll purchase that little cartridge, it would be fun to shoot at the range and kill a buck, just haven't decided which make of rifle, may go custom.