6mm Creedmoor reloading......SRP or LRP?

[Jimbee]

Ordered a 6mmCM barrel to replace a .270 barrel on a stainless Tikka. Going to start preparing brass and I have Hornady once fired 6.5cm LRP brass or Lapua 6.5cm SRP brass to use. Any suggestions? It's a 7 twist, 19" tikka profile flared for 5/8 threads. Planning on shooting 108 eldms.
Thanks

 

[ID_Matt]

Regardless of SRP or LRP, Lapua is the superior brass and the choice I would go with.

 

[axeforce6]

If it's a hunting rifle, I would go LRP. More ignition foe colder weather.

 

[ID_Matt]

If it's a hunting rifle, I would go LRP. More ignition foe colder weather.

If only burning 40 grains of powder, is that still a potential issue?

 

[amassi]

If only burning 40 grains of powder, is that still a potential issue?

Nope
But I use cci 450 Sr mags in creedmoor cases. Never had an issue when I was using fed 205ms but they're pretty rare now a days

 

[amassi]

If it's a hunting rifle, I would go LRP. More ignition foe colder weather.

If your worried theres the Cci 450- Sr brass is really nice for cm based cartridges especially with upper end loads

 

[ID_Matt]

Nope
But I use cci 450 Sr mags in creedmoor cases. Never had an issue when I was using fed 205ms but they're pretty rare now a days

I have used the 450's in a creed and dasher and never had a problem but the coldest I have shot was a PRS match that was probably down in the teens for temp.

 

[amassi]

I've shot those loads below zero never had an issue with ignition

 

[sndmn11]

Measure the diameter of your firing pin for the answer.

 

[ResearchinStuff]

which primers do you have on hand? That would be my determining factor, if you have both use the Lapua since it's almost definitely the better brass.

 

[ljalberta]

I thought 6mm cm SRP was one of the halted production cases. I could be wrong, but it might be worth checking to ensure supply is not an issue if you choose that route.

 

[Harvey_NW]

I've seen SRP in stock a lot more than LRP as of late, that might contribute. I've had good luck with both IMR and H4831 in 6 Creed, switching to 4350 though it seems to be pretty optimal across the board with the creeds.

 

[wind gypsy]

I thought 6mm cm SRP was one of the halted production cases. I could be wrong, but it might be worth checking to ensure supply is not an issue if you choose that route.

It seems OP is planning on necking down 6.5 brass he already has on hand.

@Jimbee - I assume you've looked into neck clearance and the possibility of needing to turn necks if things are too tight after necking down? I'd definitely just source 6CM headstamp brass if you can.

 

[Harvey_NW]

It seems OP is planning on necking down 6.5 brass he already has on hand.

@Jimbee - I assume you've looked into neck clearance and the possibility of needing to turn necks if things are too tight after necking down? I'd definitely just source 6CM headstamp brass if you can.

I agree. Peterson SRP and LRP in stock-

Search results for '6 creedmoor brass' - Graf & Sons

www.grafs.com

 

[ljalberta]

It seems OP is planning on necking down 6.5 brass he already has on hand.

@Jimbee - I assume you've looked into neck clearance and the possibility of needing to turn necks if things are too tight after necking down? I'd definitely just source 6CM headstamp brass if you can.

Whoops. I suppose I should work on my reading skills.

 

[VernAK]

I've used LRP mostly as I I haven't had any SRP.
I did well with H4350 but much prefer 40grs RL16 with 108 ELDM.

 

[amassi]

Measure the diameter of your firing pin for the answer.

What size tikka firing pin is small rifle ?

Sent from my SM-G991U using Tapatalk

 

[Jimbee]

It seems OP is planning on necking down 6.5 brass he already has on hand.

@Jimbee - I assume you've looked into neck clearance and the possibility of needing to turn necks if things are too tight after necking down? I'd definitely just source 6CM headstamp brass if you can.

I'm trying to justify this project by telling myself that this will be a great rifle for my 15 year old son and using some components I already have. I didn't think it would be much of an issue to neck down some brass I already had, but haven't looked into it much. I could be talked into buying proper brass if it makes more sense.

 

[Jimbee]

I have a pretty good supply of cci 450s fwiw.

 

[Jimbee]

Measure the diameter of your firing pin for the answer.

I didn't know this was a thing......? Please tell me more