260AI

[Eric H]

Came across a .264 24" blank with 9.5 twist. Looking to push 100Gr copper bullets and would like to know if anyone has Quickload that would give me an idea of speed and max load I may obtain.

 

[buckbrush]

I've got some 100 grain Barnes TTSX data out of a 260 AI. It's only an 18" barrel though. Happy to dig it up and share if interested.

 

[Eric H]

I've got some 100 grain Barnes TTSX data out of a 260 AI. It's only an 18" barrel though. Happy to dig it up and share if interested.

Absolutely!!

 

[buckbrush]

I was using H4350 and CCI200s. I don't recall what the freebore was with the reamer. It's quite short. I only measured the COAL at 2.760".

I got all the way up to 48.7 grains and 3144 fps before stopped due to pressure signs. This was with 260 Lapua brass.

Barrel is an 8-twist Lilja. Hopefully this helps.

 

[Eric H]

Thanks. Hope to run 100gr hammers

 

[lancetkenyon]

Standard FB for the .260AI is .050".

I am a huge fan of the .260AI. I have two currently. A 24" and a 20".

I am running Alpha .260Rem brass.
SRP in the 24" w. 130 OTM & 46.2gr H4350 @ 3086fps
LRP in the 20" w. 140 Hyb & 45.8gr H4350 @ 2914fps

Even though I am shooting significantly heavier bullets, H4350 should work fantastic with a 100gr mono.

Once you get brass FFed, I would start at 44.5gr and go up to about 47.5ish, stopping when you hit pressure.

Was shooting the 20" today, banging steel from 751 to 1389 yds.

 

[Eric H]

Gonna pull trigger today for a Rem SA to get started.

 

[Dmagna]

I would hate to see you put yourself in a box with the 9.5 twist. I had a 9 twist and sold it because I wanted to shoot different bullets and couldn't. I was key holing solids, you can't over stabilize hammers so I would go with a 1-8 just to have the security of shooting different bullets down the road.

 

[Eric H]

I would hate to see you put yourself in a box with the 9.5 twist. I had a 9 twist and sold it because I wanted to shoot different bullets and couldn't. I was key holing solids, you can't over stabilize hammers so I would go with a 1-8 just to have the security of shooting different bullets down the road.

Already got my barrel and going forward. Ran the numbers on certain bullets and theoretically they will work. On paper the lite bullets 97 to 101 that I selected should do well. Stay tuned.

 

[lancetkenyon]

I would hate to see you put yourself in a box with the 9.5 twist. I had a 9 twist and sold it because I wanted to shoot different bullets and couldn't. I was key holing solids, you can't over stabilize hammers so I would go with a 1-8 just to have the security of shooting different bullets down the road.

Both my .260AIs are running 1:7.5" twists with fantastic results.

But a 100gr mono should do OK in a 1;9.5", and be cruising along like a laser beam.

 

[lancetkenyon]

Gonna pull trigger today for a Rem SA to get started.

Have you looked at some of the less expensive customs? By the time you get done with the work on a Rem action, youbare almost at the same price of a budget custom action.

Kelbly Atlas Tac or Atlas Lite
Defiance Classic
Zermatt Origin

 

[Eric H]

Have you looked at some of the less expensive customs? By the time you get done with the work on a Rem action, youbare almost at the same price of a budget custom action.

Kelbly Atlas Tac or Atlas Lite
Defiance Classic
Zermatt Origin

I found a new factory Stainless Remington Short.Action for under 650. Blank barrel under 150.

 

[Mike D Texas]

What distances are you shooting? I'm assuming shorter distances because you are certainly handicapping yourself with many choices you are making with this build.

 

[Eric H]

Maybe 300yds