280 AI load data?

[PApa Black]

Thanks to all!

 

[25WSM]

This was a very good thread I learned a bit more on this one myself. And no one was saying how thier 280ai is faster than a 7 mag either. That's refreshing.
Shep

 

[keithcandler]

Dude, that's screaming in a 280 AI!!! That's what I'm getting for the 175 ELDX in my 7 STW, and that's with 17 gr more powder!! I couldn't reach the next velocity without being over pressure.
I'm impressed

Pretty much what I get also, my barrel is 26".

my 7 Mag is 75 fps faster with R#26, 26" 9T barrel.

 

[25WSM]

There's no doubt the 280ai is one of the best he ever made. And yes that's what I see from the 7 mag. About 100fps more. I could probably hunt the rest of my life with just a 280ai but what fun would that be.
Shep

 

[Bob Wright]

This was a very good thread I learned a bit more on this one myself. And no one was saying how thier 280ai is faster than a 7 mag either. That's refreshing.
Shep

Shep, here is a very basic test over lab radar of 3 powders I tried. Hopefully my chicken scratches are legible.
145 Barnes LRX
Proof SS 26" 8.4 twist and a brake
Plain old SAAMI chamber
The RE 23 ended up winning the race and due to another node I found in the 3100 range over the other 2 powders. No pressure...
(Both pics are identical, ignore one).

 

[25WSM]

That's amazing that rl23 is that fast. Like I said can't wait to try it in mine. What load did you first see any pressure?
Shep

 

[25WSM]

I shoot berger 168 vld hunting from mine and I have mine throated longer than sammi. We been playing with the 165 game changer too and it's shooting them very accurately. We only have them just over 2900 right now but I think the rl23 might get us to 3000. Will be used on several deer this sat. coming up.
Shep

 

[codym]

I have been messing with a 24' proof research 1:9. I got to 2975 with the 175 Berger's but was getting ejector swipe. I'm running that loads at 2930 right now. Don't forget H-1000. I was breaking in the barrel with h-1000 and 165 game changers and had no issue hitting 2975 with. 61 gns. These are speeds over a labradar but not drop verified yet.

In my previous 280 ai with a 26' barrel it was h4831sc with 162 elms and 168 Berger's at 2950. The Berger's shot better for me.

 

[codym]

I'm getting pressure right at or slightly over 58 gns with the 175's

 

[Bob Wright]

That's amazing that rl23 is that fast. Like I said can't wait to try it in mine. What load did you first see any pressure?
Shep

I never made pressure on any of the 3. Was running out of powder space, compressing lightly on RE17 and RE23. The original Nosler factory ammo brass weighs more and holds a lot less water weight than the new Nosler brass in a box. The short story is I get to start over with new brass and Hammer 143's coming this week.
Also was using CCI BR2 primers, FYI.

 

[Bob Wright]

I shoot berger 168 vld hunting from mine and I have mine throated longer than sammi. We been playing with the 165 game changer too and it's shooting them very accurately. We only have them just over 2900 right now but I think the rl23 might get us to 3000. Will be used on several deer this sat. coming up.
Shep

You'll have more powder space being throated and not using copper (long for weight). I want to say you will get into 3050+ as a guess. I just couldn't find a pressure sign with the lighter Barnes and the boat tail being below the neck junction quite a bit at .050 off the lands taking up space....I'm a Hodgdon guy, but this RE23, I even run in my 7 mag and never desired it to hit pressure past its accuracy node at 2920, 175 ABLR . Good enough for hunting and no more brass growth in the pockets etc...

 

[Bob Wright]

And look what just arrived in the mail!

 

[Tidus56]

I trying decide between the 155 HH or the 143 HH. I will be interested in your results.

 

[25WSM]

I've never shot any of the hammers at all. They seem like a Barnes so should be a good killing bullet.
Shep