6.5 creedmoor primer

[howard01233]

Any major difference using a small primer compared to large primer.
I know you shouldn’t make a load development then swap the size of primer.
I have rounds to use which are large primer, just checking if it’s better with small for any reason.
Primarily hunting round but will be using at the range.

 

[Dogtra UK]

Having just ordered a 6mm Creed I was reading up on this.

Small allows you to work to higher pressures and the pickets take longer to go slack.

Only downside is conversions from older rifles that were designed around large primers where the firing pin can cause cratering.

 

[howard01233]

Thank you I was wondering why Sako factory are large and seeing lapua doing small primer brass only.
Makes sense now

 

[scotch_egg]

Lapua are now making large primer brass for the creedmoor.

@Laurie has done extensive testing with large and small primers.

When temperatures drop the small primers struggle with the higher weight loads and can cause hang fire.

 

[Bosbuck]

SRP don't work with some rifles as the firing pin it to large. Cratered and blown primers can be an issue.

 

[howard01233]

Lapua are now making large primer brass for the creedmoor.

@Laurie has done extensive testing with large and small primers.

When temperatures drop the small primers struggle with the higher weight loads and can cause hang fire.

 

[MarinePMI]

SRP, can have significant problems with igniting large cases such as the 6 and 6.5 CM. Usually a SMRP will resolve ignition issues.

That being said, this is physics, and there is no free lunch. The smaller ignition source does give more uniformed ignition when hot enough, as well as the case is stronger due to more brass in the case head. But, velocities in some cases are actually lower with SRP (Mag or otherwise) with the same powder charges.

I just saw this with one of our club members, as he just switched to a 6 CM...

 

[martin_b]

I have both SRP and LPR Peterson 6.5CM Bass I loaded them both with the same amount of powder, and shot them at 900yards. I couldnt tell the difference. The issue was when it came to reloading the cases and I forgot i had a mixture!

 

[howard01233]

I have both SRP and LPR Peterson 6.5CM Bass I loaded them both with the same amount of powder, and shot them at 900yards. I couldnt tell the difference. The issue was when it came to reloading the cases and I forgot i had a mixture!

Thank you for the information

 

[hendrix's rifle]

Lapua are now making large primer brass for the creedmoor.

@Laurie has done extensive testing with large and small primers.

When temperatures drop the small primers struggle with the higher weight loads and can cause hang fire.

Try telling that to Mark at spud reloading

 

[howard01233]

Try telling that to Mark at spud reloading

Thanks for the info

 

[scotch_egg]

Try telling that to Mark at spud reloading

What does Spud know

New! 6.5 Creedmoor Large Rifle Primer cartridge case

The new Lapua 6.5 Creedmoor Large Rifle Primer cartridge cases provide competitive shooters, hunters and Mil/LE operators an option utilizing a large rifle primer for enhanced performance in inclement…

www.lapua.com

 

[hendrix's rifle]

What does Spud know

New! 6.5 Creedmoor Large Rifle Primer cartridge case

The new Lapua 6.5 Creedmoor Large Rifle Primer cartridge cases provide competitive shooters, hunters and Mil/LE operators an option utilizing a large rifle primer for enhanced performance in inclement…

www.lapua.com

Even argued with me after I posted that....

 

[Neddle]

Lapua are now making large primer brass for the creedmoor.

@Laurie has done extensive testing with large and small primers.

When temperatures drop the small primers struggle with the higher weight loads and can cause hang fire.

They struggle with light loads in cold weather

 

[Neddle]

Watch this series of tests

 

[nun_hunter]

Has anyone actually tested to see if the British weather is extreme enough to affect a small rifle primer in a Creedmoor load? I've heard numerous things about the cold weather causing problems but the only anecdotal evidence is from some forums where people are shooting in proper extremes of -20°C.

My load development was done in about -2°C and I never had a single issue and that was with Ramshot Hunter, a ball powder supposedly more difficult to ignite.

 

[MarinePMI]

We only get down to just above 0* C here, and we saw issues with SRP ammo in the cold, not igniting properly. A lot of sooty cases, with erratic amounts of soot. Some all the way back to the case head, some just to the shoulder. Pretty obvious that ignition was an issue, even if the SD numbers were still good...

 

[howard01233]

We only get down to just above 0* C here, and we saw issues with SRP ammo in the cold, not igniting properly. A lot of sooty cases, with erratic amounts of soot. Some all the way back to the case head, some just to the shoulder. Pretty obvious that ignition was an issue, even if the SD numbers were still good...

Going to get large primer brass now

 

[Gm81]

So i use Srp brass. Was load testing last week and never had any issues. The ground was frozen all day. Ammo was out in the cold as well. Never missed a beat.
Is most of this issue with people in America? Seems like that's where most of the talk and you tube stuff comes from.
Is any one in the UK having these issues?

 

[1967spud.com]

What we talking about , spud knows **** all about most things to be honest lol

stay safe every one