Thread: .260 Advice

Originally Posted by NZVarminter

Take a look at the 6.5 Super LR:

6.5 Super LR

Improved 260 with no fireforming required. Dean Maisey has reamer.

Would it be worth the hassle when 260 and 6.5 Creedmoor are almost as good, but can get factory ammo and don't need custom dies?
Would be worth considering as an alternative to 260AI, no fire forming sounds good.

Originally Posted by NZVarminter

Take a look at the 6.5 Super LR:

6.5 Super LR

Improved 260 with no fireforming required. Dean Maisey has reamer.

No fire forming is not exactly true. You still have to pump the shoulder out to 30deg and lengthen the neck. What they mean by that statement on the website is, you can either fire factory 260 or standard reloaded 260 in that chamber, use it for hunting or what ever and it will be formed. You can also do this for the 40deg version but it usually takes 2 firings to properly form that case.

It is just a .260 AI with a 30° shoulder.


Sent from my SM-G935F using Tapatalk

Originally Posted by R93

It is just a .260 AI with a 30° shoulder.


Sent from my SM-G935F using Tapatalk

You got the line out there R93?

Originally Posted by Mathias

You got the line out there R93?

I think I remember reading Ackley played with the 30° shoulder but don't know if it should be classed as an Ackley or improved. Either way I like cartridges like that.

Sent from my SM-G935F using Tapatalk

Originally Posted by R93

I think I remember reading Ackley played with the 30° shoulder but don't know if it should be classed as an Ackley or improved. Either way I like cartridges like that.

Sent from my SM-G935F using Tapatalk

Fred Huntington of RCBS fame was a 28deg man, he believed that was the right recipe. Look at most of your proven target rounds like the BR, CM, Lapua and the likes, they are all 30deg. PO Ackley was regarded as a radical man of the sport with his improvements

Originally Posted by Mathias

Fred Huntington of RCBS fame was a 28deg man, he believed that was the right recipe. Look at most of your proven target rounds like the BR, CM, Lapua and the likes, they are all 30deg. PO Ackley was regarded as a radical man of the sport with his improvements

It is now obvious to me that you have 40° envy....

That extra 7.3 fps I get must be bothering you ha ha

Sent from my SM-G935F using Tapatalk

And appears to be going similar speeds to a 260 so why bother.

Sent from my SM-G950F using Tapatalk

Originally Posted by BRADS

And appears to be going similar speeds to a 260 so why bother.

Sent from my SM-G950F using Tapatalk

Boring BRADS too mainstream bro.....

Originally Posted by Mathias

Boring BRADS too mainstream bro.....

Fair call mate.
Mainstream is good sometimes
Ai is cool is until you throw in forming and poor resale..for how much gain?


Sent from my SM-G950F using Tapatalk

Originally Posted by BRADS

Fair call mate.
Mainstream is good sometimes
Ai is cool is until you throw in forming and poor resale..for how much gain?


Sent from my SM-G950F using Tapatalk

I'm agreeing here - sometimes it is good to stay to mainstream!

Sent from my VKY-L09 using Tapatalk

Originally Posted by BRADS

Fair call mate.
Mainstream is good sometimes
Ai is cool is until you throw in forming and poor resale..for how much gain?


Sent from my SM-G950F using Tapatalk

Forming used to be a pain along with a bit of trepidation. Having a heap done with a good load you may not ever need to do it again depending on how much you shoot said rifle. Would I want an cartridge that required forming for a target rifle...hell No.

There isint much gain over the standard to be fair but imo, enough to be usable.

I have heard some amazing velocity stories from standard .260s that are better than I can get with the AI. Not saying they cant, but physics is physics.

Maybe the brass is used only once.

Barrel tolerances aside, gaining 150-200fps from expected standard speeds with a given projectile has to be unique?


Sent from my SM-G935F using Tapatalk

I seriously considered sticking a reamer up my sako cause ai looks fucking cool..
With a fast tube and long throat on load development there was no gain so saved the $....
Each to there own a.
Clients looseing brass would piss me off


Sent from my SM-G950F using Tapatalk

Interesting. I P+ my first AI barrel and it was the slowest out of the 3 I had. Almost went to a standard then.

Ha Ha I can't tell you how much time I have wasted looking for ejected brass while hunting.

I know a guy So I might not have to form another case for a few years depending on how many I lose.

Looks of a cartridge dont bother me much but brass prep does.
I hate trimming. Dont know why but havent had to do it yet with the improved case.


Sent from my SM-G935F using Tapatalk

The 143 didnt shoot in mine at all. 140 Amax goes good. But they are now some what irrelevant.

Gimpy was going to give me some 147 to try but I gave up on the idea as I get what I need out of it with cheap hornadys.
I like the 123 for reminding me how accurate the rifle is.
They shoot consistently the tightest out of all the bullets I have tried.

Sent from my SM-G935F using Tapatalk