260AI

[Mike D Texas]

Big 260AI fan here but surely wouldn't handicap it with a slow twist barrel.

Or a light weight bullet. Seems like the Creedmoor or Grendel would be the easy button here.

 

[Mike D Texas]

This is at6500' and 80°F. Pronghorn country. The 100HHT @ 3400fps is barely a 900 yard round in my opinion.
Take 400fps off, and more like a 650yd round.

View attachment 555753

I agree. My 260AI runs the 142 ABLR @ 3044 with a 24" barrel.

This is my chart for 1250' elevation. I'm taking it to NRA Whittington next month and will be at 6680'

 

[Eric H]

Something to do. Plus if I want to go further I have my 6.5x284 or 6.5Needmore. Also have the 6Needmoor, .308, 243, 30.06(7), 6.5 grendel, 6ARC, 25.06, and 25.45 to name a few.

Reiterated

 

[lancetkenyon]

Or a light weight bullet. Seems like the Creedmoor or Grendel would be the easy button here.

While a CM would be easier, You would be losing a lot of speed with these choices though.

A slow twist is not my choice, it is still acceptable for a .260AI. Look at all the old .264WM w. 1:9.5" twists back in the day. They can't take advantage of today's heavy for caliber high BC bullets, they make a good super fast lightweight bullet medium range rifle. If shots are going to be 500 or less, pushing a lightweight fast makes sense. It is out west where shots can be 500-700+ where the high BC heavies really shine.

 

[Mike D Texas]

While a CM would be easier, You would be losing a lot of speed with these choices though.

A slow twist is not my choice, it is still acceptable for a .260AI. Look at all the old .264WM w. 1:9.5" twists back in the day. They can't take advantage of today's heavy for caliber high BC bullets, they make a good super fast lightweight bullet medium range rifle. If shots are going to be 500 or less, pushing a lightweight fast makes sense. It is out west where shots can be 500-700+ where the high BC heavies really shine.

I get it. I just don't understand the desire to go through all the fireforming and what not with a 260AI to use a slow twist barrel and light bullets.

 

[Eric H]

I get it. I just don't understand the desire to go through all the fireforming and what not with a 260AI to use a slow twist barrel and light bullets.

Just another 6.5 in a different twist. Already got 6.5CM and 6.5x284. Just another deer killing machine. Stay tuned, GS got it and got my 6CM and 6GT back today.

 

[Coyote Shadow Tracker]

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.

What kind of groups are you getting at 100, 300, 600 with the 130 OTM and 140 HYB?