Peterson 6 ARC Brass

[Old Bob]

Giessele Automatics has Peterson 6mm ARC brass. It's a little pricey compared to Starline brass but if it's as good as Lapua 6.5 Grendel brass was for converting to 6 ARC it might be worth the price. Geissele also has Alpha Munitions 6 ARC brass. I have some, it's good brass ... better than Hornady or Starline. 

Peterson:  https://geissele.com/peterson-cartridge-...brass.html

Alpha:  https://geissele.com/6mm-arc-unprimed-brass.html

Was curious 'cause I hadn't heard Peterson was offering 6 ARC brass, I looked on their website. If they are making this brass, it's still not listed on Peterson's website.

[CZ527 Guy]

Peterson was Suggesting a release on the 6mm ARC brass a year ago perhaps more.
Thank you for Sharing!

See they are suggesting delivery in 6 to 8 weeks. Sounds like a 2025 offering.

[Old Bob]

Peterson was Suggesting a release on the 6mm ARC brass a year ago perhaps more.
Thank you for Sharing!

See they are suggesting delivery in 6 to 8 weeks. Sounds like a 2025 offering.

I didn't try to order any so I didn't get that far to see their estimated delivery time. I have a bunch brass: Couple of hundred new Hornady & Starline; 50 or so once fired & a big bunch converted from Lapua 6.5 Grendel & 22PPC (400 - all needing to be fire-formed).

Edit to add: I think that 6 to 8 week shipping notice is Geissele's standard disclaimer for, whatever reason, they are a little slow in the shipping department. I think no matter what you order, you'll get the same disclaimer.

[CZ527 Guy]

Regarding the disclaimer, Sounds like they may go a bit overboard with under-promising, to make it easy to over deliver more often than not.

[corpsman8483]

ANybody tried 6 ARC brass from Alpha munitions?

[Old Bob]

ANybody tried 6 ARC brass from Alpha munitions?

I've loaded some but haven't shot any yet. With the first 100 cases, I found their primer pockets were really tight. I had to add a second step to my priming set-up to get the primers seated to where they weren't above flush with the with the cartridge base. No matter how deep I adjusted my RCBS bench primer seater, I couldn't get my primers seated below flush. To get them below flush (& just barely so), I had to do a second step with a RCBS ram type primer seater installed on my reloading press. Funny thing though, the Alpha brass primer pockets were .001" deeper than either Hornady, Starline or Lapua. Did the tighter pockets obdurate the primers making them deeper/longer than normal?

I had no problems seating primers in a second batch of Alpha 6mm ARC brass (different lot#). Their pockets weren't as tight but were still deeper than the other 3 brass makers. I could get primers seated below flush with my normal process.

BTW, I did order some Peterson 6 ARC brass. I wasn't going to but I was curious to see if their 6-8 weeks shipping disclaimer was for real, so I ordered a box. Turns out, that disclaimer didn't apply ... this time. Tracking info from Geissele/UPS says my brass will arrive here Monday.

[CZ527 Guy]

I have loaded most every 6mm ARC offering available with the exception of Peterson. Thus far with only 6 firings on the Alpha 6mm ARC brass I do feel Alpha brass is better to the point that if you shoot a lot & you save your brass & you have a good controlled way to anneal your brass, then Alpha may be worth the extra expense up front. I do have high hopes of being able to utilize the alpha brass for more than double the brass life, with sane loads.

Hope to start putting the Peterson brass through the steps this weekend. The Brown truck is suppose to be dropping off a package today. My hope is Peterson brass might be as good as the Alpha brass for a better price point. May not really know how this works for a few weeks or months weather dependent. Sub zero weather becomes common along with substantial wind this time of year here.

[CZ527 Guy]

Peterson 6mm ARC brass arrived today early enough that I was able to do a rather quick evaluation. Visually the brass is superb with rather sharp edges where you want a good sharp edge & radius on the base of the case & going into the primer pockets. Only sampled 5 cases at random as I wanted to do a bit of test firing B4 dark.

Of the 5 cases brass weighed 115 grains +/- .24 grains on the A&D 120 I. The weight compares to the Hornady that varies considerably more & seems to average closer to 110.25 grains.

Loaded 5 rounds of the virgin Peterson 6mm ARC brass w 28.6 GR of CFE 223 & 3 rounds with the same charge in the Hornady 2xfired brass. This is pushing a 90 gr Hornady CX. In this small sample velocity was surprisingly similar w 2745 FPS Average velocity from each from my 22" 5 groove Pacnor barre on the CZ 527 bolt action rifle.

After firing the brass the case capacity of the Hornady brass is running roughly 34.5 gr of CFE 223 in the Peterson brass VS 35.96 gr of the CFE223 in the Hornady brass.

[Old Bob]

Impressions of Peterson 6mm ARC Brass: Good stuff! Absolutely prime brass & could be loaded as is but the inside case mouths should still be chamfered first. Got similar case weight sample results as CZ527 Guy. Cartridge trim lengths were 1.4795" to 1.480".