High pressure, light load 6.5-06 AI

[Philly]

I just rechambered a creedmoor to a 6.5-06 Ackley. 50 gr IMR 4350 pushing a 140. Bought some inexpensive PPU 25-06 brass. Fire formed with RL19 (then ran out). Loaded a few after forming , went to the range and experienced way too high of pressure. Blew one primer. Can see the ejector imprint. Any ideas? I have some Lapua brass that I’m going to load and try also. Maybe someone has a good load recipe? Thanks.

 

[L.Sherm]

Whats your chamber neck dia?
Are you neck turning brass?
What primer are you using?
I load for 2 with H1000 Berger 140's and fireform all the brass from 06 Lapua

 

[243winxb]

6.5-06 Ackley. 50 gr IMR 4350 pushing a 140.

Not AI - 46.8 of IMR 4350 maximum @ 62,300 PSI

PPU 25-06 brass

Makes more PSI.




The 6.5-06 A-Square is a centerfire rifle cartridge that originated as a wildcat, based on the popular .30-06 Springfield. A-Square standardized the dimensions of the cartridge and submitted them to SAAMI in 1997.

 

[L1986]

Not sure on 2506 but the ppu brass I have used on other calibers has had much less capacity then other brands.

 

[STOMP442]

What was your velocity? In any case you are hot and I would back it down at least a grain and see how she does. The 6.5-06AI has always been a fantastic and very accurate cartridge for me but I have always used H4831 and slower for best results.

 

[Walt Krafft]

Case length? Trimming needed?

 

[Philly]

Whats your chamber neck dia?
Are you neck turning brass?
What primer are you using?
I load for 2 with H1000 Berger 140's and fireform all the brass from 06 Lapua

Neck loaded is .2885. Fired is .2950. Use WLR primers. Unturned necks.

 

[Philly]

What was your velocity? In any case you are hot and I would back it down at least a grain and see how she does. The 6.5-06AI has always been a fantastic and very accurate cartridge for me but I have always used H4831 and slower for best results.

Do you have a starting load recommendation for 4831?

 

[STOMP442]

Do you have a starting load recommendation for 4831?

I am at work at the moment. I will have to go back through my notes and find it when I get a chance.

 

[L.Sherm]

Neck loaded is .2885. Fired is .2950. Use WLR primers. Unturned necks.

You have some very thin necks, your gonna have to turn necks with Lapua 06 brass I do for a .297 neck chamber and .2935 loaded.

 

[Philly]

You have some very thin necks, your gonna have to turn necks with Lapua 06 brass I do for a .297 neck chamber and .2935 loaded.

Maybe that’s the drawback using 25-06 brass.

 

[L.Sherm]

Lapua us just better brass in all aspects, I also try and avoid necking up when possible even though I do for my 30-28 necking down instead of up helps alot with donuts at the neck shoulder junction, by the way are you seating into a donut?
If you have a guage pin run it down the neck after sizing if it stops you have donuts in the bottom of your necks

 

[Philly]

Lapua us just better brass in all aspects, I also try and avoid necking up when possible even though I do for my 30-28 necking down instead of up helps alot with donuts at the neck shoulder junction, by the way are you seating into a donut?
If you have a guage pin run it down the neck after sizing if it stops you have donuts in the bottom of your necks

No donuts that I can feel. I'm going to try 45 gr 4350 and see where that goes. Looking at the A-square load data that 243winxb shared. Check velocity this time.

​

 

[L.Sherm]

No donuts that I can feel. I'm going to try 45 gr 4350 and see where that goes. Looking at the A-square load data that 243winxb shared. Check velocity this time.

​

You won't feel them untill there really bad. If your not seating in the donut area nothing to worry about i dont because I have .130 freebore in my reamer but the A square reamer only has about .050.
I run the 2 i load for at 3120 and 3130 so those velocities are way off.