Your "Go To" primer for the Grendel

[RakkasanDad]

Just wondering what everyone's favorite primer they are using? I need to order some and was just wondering. I plan on shooting 120gr Nosler Ballistic tips with BLC 2.

. Thanks all

[Lead Chucker]

Mine is the CCi #450 small rifle magnum. I use if for all my grendel loads

[LRRPF52]

AA used mostly CCI 450's for their load development after testing a lot of primers.

I have been using Remington 7.5 BR primers since 2009, with good results.

There is a detailed discussion on primer selection for the Grendel/AR15 in Volume II of the 6.5 Grendel Reloading Handbook series, specifying which ones are thicker, versus the ones that are thin in the cups. It's on page 67.

[dammitman]

Has anyone ever found that using a certain primer actually was the culprit making a load inaccurate in their grendel? Just the primer change, nothing else at all.

[RakkasanDad]

Thanks. I bought a copy from u last week, but have only had time to read the first half and flip through the load data. I have a few 7.5's left but was thinking of trying some 450's. I hope to get to finish reading the rest of it tonite.

[bwaites]

Wolf Small Rifle Magnum primers.

[Whelenon]

cci 450

[davidj]

CCI 450 or Rem 71/2 BR. Whatever happens to be on the shelf.

[NugginFutz]

Wolf Small Rifle Magnum primers.

How often do those come available?

[bwaites]

How often do those come available?

Fairly. I bought a bunch last time, (pre Obama II) so haven't really looked lately. I bought mine from one of the online dealers, (I think it was Powder Valley). Wideners has them now:

https://www.wideners.com/itemdetail.cfm?item_id=7283

[VASCAR2]

I've used CCI 450 but I just loaded a few rounds with CCI 41 primers to test. I also used a few hundred Remington small rifle primers with no issues.

[Dogue]

Wolf SRM's or CCI 41's.

[tackdriver]

I had a pet load in one of my grendels that used winchester small rifle and was very accurate. I loaded up 50 w/same load and #450 and I must have been close to the limit to start with because I pierced the primer on 2 of the first five. I now only use #450 but had to slightly adjust my loads

[bwaites]

I had a pet load in one of my grendels that used winchester small rifle and was very accurate. I loaded up 50 w/same load and #450 and I must have been close to the limit to start with because I pierced the primer on 2 of the first five. I now only use #450 but had to slightly adjust my loads

That's strange! I've heard it go the other way, but not a safe load with Winchesters that caused piercings in 450's!

Was the temperature the same?

[Drifter]

Has anyone ever found that using a certain primer actually was the culprit making a load inaccurate in their grendel? Just the primer change, nothing else at all.

I don't think that a particular primer will make a good load shoot poorly, but a particular primer can sometimes tighten up a load that last little bit.

For that reason, I like to keep a few different primers on hand for final load tweaking. CCI 41's, Rem 7.5's, Federal AR Match, Wolf SRM's, and Tula SRM's have all provided good results for me, and the "best" can vary by load and / or barrel.

But for someone who doesn't want to buy a variety, any of the aforementioned primers will serve just fine, and very little chance of the primer ruining an otherwise good load.


ETA- If working close to max loads, it's a good idea to work up again if changing primers.