408 Cheytac Brass

Re: 408 Cheytac Brass

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mtnhntr</div><div class="ubbcode-body">Bertram is really good I would take it over Jamison any day. especially the new stuff coming in. </div></div>

Yip your right there very good brass once you guys get a taste of it Jamison will only be a memory
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Re: 408 Cheytac Brass

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mtnhntr</div><div class="ubbcode-body">Same here on primer pockets and I get average 3 shots and then neck wants to split. </div></div>

Is this on the JI two-star brass or older stuff? I bought a bunch of the two-star when Midway had it on closeout, but haven't gotten around to loading any up.
 
Re: 408 Cheytac Brass

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mtnhntr</div><div class="ubbcode-body">Same here on primer pockets and I get average 3 shots and then neck wants to split. </div></div>

Is this with annealing? I anneal and get about 6 firings before the primers fall out of the pockets. Bertram gives 9-10 firings with the same load.
 
Re: 408 Cheytac Brass

Not trying to thread jack but had a question about the 408 re: Lehigh Bullets. Anyone use there bullets? What COL are folks running with them. I am seating them at 4.245 and it is touching the rifling, bolt is tight and getting a faint ring mark on the bullet.
 
Re: 408 Cheytac Brass

I have been shooting the Jamison two star 375/408 brass. I have fired some of this brass twenty times and have not had a split neck. I can tell the pockets are not as tight but I have never had a primer fall out. You boys must be running really hot.

I too have tested a few hot loads in both the 338/408 and the 375/408. I still have not seen split necks or primers falling out. On over pressured loads the brass will become sticky. Highly over pressured loads may be a bit sticky on the second firing and have severe extraction problems by the fifth firing. I have several pieces of this brass that have extraction issues due to over pressured loads and the pockets are still usable and I have never seen a split neck.

When I was testing the long solids I was shooting a lot of mild loads, I had a set of five pieces that had thirty cycles on them. They became sticky even after full length sizing, still there were no split necks and the pockets were usable.
 
Re: 408 Cheytac Brass

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Augustus</div><div class="ubbcode-body">I have been shooting the Jamison two star 375/408 brass. I have fired some of this brass twenty times and have not had a split neck. I can tell the pockets are not as tight but I have never had a primer fall out. You boys must be running really hot.

I too have tested a few hot loads in both the 338/408 and the 375/408. I still have not seen split necks or primers falling out. On over pressured loads the brass will become sticky. Highly over pressured loads may be a bit sticky on the second firing and have severe extraction problems by the fifth firing. I have several pieces of this brass that have extraction issues due to over pressured loads and the pockets are still usable and I have never seen a split neck.

When I was testing the long solids I was shooting a lot of mild loads, I had a set of five pieces that had thirty cycles on them. They became sticky even after full length sizing, still there were no split necks and the pockets were usable.


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I really don't think I am standing on it that hard with my "go-to" load. It's 132 grains of Retumbo, GM215M primer, 350 SMK at 4.200" COAL. Velocity is 3060 fps. From what I have read that's not too hot of a load...
 
Re: 408 Cheytac Brass

We are doing something different, I pushed the 350 SMK to 3170 with US 869. I have never had a primer fall out or seen a split neck.
 
Re: 408 Cheytac Brass

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Augustus</div><div class="ubbcode-body">We are doing something different, I pushed the 350 SMK to 3170 with US 869. I have never had a primer fall out or seen a split neck. </div></div>

Is yours an improved version?
 
Re: 408 Cheytac Brass

No, it's standard, I have also shot a 338 Snipe-tac and a standard 338/408 with this same brass. I bought around 400 pcs sometime in 09 and another 800 in 2010. All of it is the 2 Star.
 
Re: 408 Cheytac Brass

Here,s the bottom line: 2 star Jamison Brass is the best and any other (Bertram) is very inconsistant. Send me a pm and I will let you know who has a lot of 2 Star Jamison Brass.
 
Re: 408 Cheytac Brass

Don't read my post wrong folks, I could not care less what brass is used by others. I intend to buy a few of the Bertram to test just to satisfy my curiosity. My only gripe with Jamison is that they tend to get sticky, I have wondered if it might be the composition of the material. I would like to try the Bertram to see how they compare.
 
Re: 408 Cheytac Brass

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: GUNENTHUSIAST</div><div class="ubbcode-body">It seems both Jamison and Bertram have staunch supporters and critics! Which do I choose!? </div></div>

Is Jamison still in Business? I thought the company was liquidated a long time ago? Just wondering as a friend was talking about this the other day.
 
Re: 408 Cheytac Brass

Well I ordered the last 100 pieces of bertram that midway had. Hopefully it is of good quality and consistency. I also ordered dies from ch4d. I need to pick up some retumbo and settle on a bullet now. I talked to edm arms and they really push the rocky mountain bullets. Their recomended load was only getting 2725 fps. I was hoping at least 2900 as 2725 doesnt even match the ballistics of my 50 cals.
What loads and velocities is everyone getting?
 
Re: 408 Cheytac Brass

I don`t know but we ran some loads thru chrono last week. We used to use RL25 but very inconsistant. Switched to Retumbo and haven`t look back. With 3 different 408`s with Retumbo and Jamison brass, RM and CE bullets, velocities close to 3000fps with great accuracy.
 
Cheytac USA, I'm not a vendor nor do I have anything to do with Captech. I don't want anything to do with Cheytac either. I dealt with Cheytac 10yrs ago. I know some of the original cheytac founding members. That's all.
 
We have plenty of brass in stock along with dies and bullets. We are CheyTac USA, LLC. I cannot spek for the past but we enjoy being part of the future. As for brass between Bertram and Jamison, both have have there strong and weak points. Give is a call I would like to help if possible. 229-686-3220 cheytac.com
 
Gentlemen,
Just following this thread for some pointers and trying to save some time on the reloading bench. Travel time to range with appropriate distance <4hrs., so having my S*** together is vital.
I have some questions for you, if you wouldn't mind answering.
1: Why abandon RL-22 for RL-25? CT-USA used this for the 419's. Have YOU (CT-USA) changed powders?
2: Are you using Retumbo (RT) for more than RMB's 420gr. RBTAT with the same accuracy? (Suggested load is RT@ 131gr. for 2600fps.)
Lehigh Defense solids (400gr) use RL-25 @ 128gr.
3: I have T-500 (HSM 400gr), CCI 250, RL-22 and Bertram brass (BB) on hand, but no reload data available other than OACL.
Your help is appreciated.
 
Contact Bill Richie at EDM Arms or George at Rocky Mountain Bullet. There have been some quantum leaps forward recently in .408 ammo development and load data. These 2 guys have fired many thousands of rounds over the last years. The .408 is alive and well and dropping 90 feet less at 3600 yards than a .375
 
Thanks for the info.
I have been (in my words) a real PIA gleaning information from both of them. Bill & his people highly recommend using RMB projos in his firearms.
Bill currently is in the process of having a U.S.M.C. digi-cam finish applied to my rifle. Forced to sit on the sidelines until I get it back, so wanted to work at the bench during downtime.
Guess the other guys are now scrambling to gather some bucks to pay for their mandatory Obubu unaffordable health care policy.