6.5 Creedmoor Lapua brass. Sm primer vs Lg primer
- Thread starter krw
- Start date
More availability along with more brand options for SRP's.
In terms of performance, SRPs can actually perform better than LRP's . . . depending on powder being used and in what temperature they're at when used in larger cartridges. They work great in my .308, but I don't shoot in temperatures below 40°F.
Small primer brass has more material in the base so the primer pockets hold up better if you are shooting hot loads.
I prefer SRP for all cartridges that I shoot often. Look into Alpha Munitions if you want some Lapua-quality brass that’s almost always available, and made here in the U.S. 
What firing pin size can you use on SRP brass? I am looking at an action that has 0.070” firing pin diameter w/ a 0.05” firing pin profusion. I notice most custom actions have a firing pin closer to .062, so not sure if .07 would be getting to LFP/LRP territory.
Don’t know much about how during pin protrusion affects it though?
Don’t know much about how during pin protrusion affects it though?
Back in 2019ish I purchased 500 6.5cm SR Lapua Cases. I received 400 SRP, and 100 LRP. I didn't make a stink about it at the time. Left the LRP's alone for almost 3 years. Finally got around to loading with them. If there is any deviation in my shooting, I can't tell. I think that the LRP's shoot the same as the SRP's. Just loaded the LRP's for a 3rd time about a month ago. It is nice to have more primer choices though with the SRP's...
New shooter here. About ready to start reloading 6.5C. I purchased 400rd of loaded Berger 140g Hybrid Target in LRP. The only primer size available currently in there loaded ammo is LRP. This was in hopes of using reusing the Lapua brass.
I'm almost at at the halfway mark of running out and starting to pick up components.
That being said, it seems going SRP from what I'm reading lends to better/more case head material if I were to push it and/or less hotdog in a hallway with the primer pockets in the long run. Also SRP availability vs LRP availability. Seems accuracy is reportedly the same.
So, since I'm only 400 in, should I start from scratch and dedicate it to SRP and sell off the LRP Lap brass? Or continue with the loaded Bergers with the LRP?
To all the veteran reloaders, I appreciate your insight! Thanks
I'm almost at at the halfway mark of running out and starting to pick up components.
That being said, it seems going SRP from what I'm reading lends to better/more case head material if I were to push it and/or less hotdog in a hallway with the primer pockets in the long run. Also SRP availability vs LRP availability. Seems accuracy is reportedly the same.
So, since I'm only 400 in, should I start from scratch and dedicate it to SRP and sell off the LRP Lap brass? Or continue with the loaded Bergers with the LRP?
To all the veteran reloaders, I appreciate your insight! Thanks
The only real downside about small primers is that you have to shoot a BR or Magnum primer as regular small rifle will have issues. Ive shot small primered Peterson 6 CM brass and its on its 5th firing with zero primer pocket issues with loads that are at or exceeding max charge.
As far as the loads go, I didn't see any difference in velocity when using BR2s/BR4s with the same powder charge. It's good to have options with primer availability.
I've shot down to -4F with Lapua SRP brass, BR-4 primers and H4350 powder without any issues.
