where are some good places to get brass, bullets, loading data and loaded ammo for my .600 OK rifle when i get it?

The answer to all of your questions is American Hunting Rifles.

Alternatives:
Custom Brass and Bullets may have some brass.

Load data - you can use 600Nitro Express data as a starting point or do a search here for what we've posted.

Dies and shellholder from CH4

Bullets from Woodleigh, Barnes, A-Square, GSCustom, Cutting Edge Bullets as well as AHR, macifej and robgunbuilder here.

The only loaded ammo I know of is from AHR.

www.jamisoninternational.com has brass as well. I would also add buying from jamison appears to be cheaper than AHR, but I will be buying from AHR because they have been so helpful in repsonding to my imbecilic questions. They don't treat you like you are clueless. Very helpful in answering questions.

Yep Jim you're right. In fact Jamison is one of two companies that makes the brass cases, the other being Horneber.
Jamison folk are nice too.

thanks very much for helping me out guys!

Wayne Jacobson said the Horneber stuff is of different dimensions and not to use it. But it was referred to as old stuff, so I don't know if they are still making runs of it. Do they?

They were don't know if they have any left or planning on more.

I use only Jamison for my 600OK and 585AHR.

I have both Horneber, Jamison and RLG brass. They all work fine.-Rob

Brass issue seems covered. For bullets, I would use CEB and/or GSC...both have extensive websites for perusal.

One thing Pez, the GSC custom bullets take between 3-4 months, as orders are run based on caliber, bullet size within caliber, and demand...so, expect a wait. Availability of commercial copper is also a factor, as that is all GSC uses. Moly coating standard; plain copper bullets available on request. Worth the wait and $$$.

CEB seems well stocked at all times. Based on Michael458's work, it seems the CEB #13 solid/NonCon bullet(s) are extremely promising, if not "...the best available."

Respects,

Phill

Rob, correct me if I am mistaken, starting loads in the neighborhood of 155gr H4350 and up. Recoil will get you waaaaaay before pressure does!

Id start with 160 grs of IMR7828 and a 750 or 900 gr bullet. The 155gr of H4350 also should work just fine. As you go up in powder you'll need to use a drop tube to maintain case capacity. The 750 gr bullets really reduce recoil significantly. I have about 150 , 750 gr bullets, available right now if anyone wants them.-Rob