22-250 AI

[klamathsteel]

What is the correct min/max trim length for this cartridge ? Searched and did'nt find. Thanks !!

 

[284winner]

The case length on the 22/250 Ackley Improved is 1.892" and the shoulder angle is 40 degrees vs. the 22/250 Remintgon 1.912" case length with shoulder angle of 28 degrees. Trim length I'd say is 1.882 on the AI version.

 

[Edd]

What is the correct min/max trim length for this cartridge ? Searched and did'nt find. Thanks !!

That depends on the length of the chamber. You need to determine what that length is.

I have reamer prints for a couple of different 22-250 AI reamers and they are the same length as a standard 22-250. On chambers cut with those reamers, the trim length would be the same as a standard 22-250.

 

[284winner]

That depends on the length of the chamber. You need to determine what that length is.

I have reamer prints for a couple of different 22-250 AI reamers and they are the same length as a standard 22-250. On chambers cut with those reamers, the trim length would be the same as a standard 22-250.

Reamer print measurement basically. Mine is 1.892 with 40° shoulder. I trim to 1.882 typically or .005 under depending on brass life.

 

[TTE]

How much case 'stretch' do you get per firing
AI chamberings should not stretch much, at least my 6.5 - 06 AI doesn't.

My max case length is 2.494. I trim to 2.490, do not have a problem at that length and they don't stretch to max for a number of firings.

I am not a competition shooter (or reloading guru), so don't really know if I am doing things incorrectly, but so far, it's worked for me.... YMMV

 

[284winner]

How much case 'stretch' do you get per firing
AI chamberings should not stretch much, at least my 6.5 - 06 AI doesn't.

My max case length is 2.494. I trim to 2.490, do not have a problem at that length and they don't stretch to max for a number of firings.

I am not a competition shooter (or reloading guru), so don't really know if I am doing things incorrectly, but so far, it's worked for me.... YMMV

Rarely do my Ackley's need trimming. Most brass wears out before trimming is needed. One of the advantages of the AI

 

[Ackman]

The case length on the 22/250 Ackley Improved is 1.892" and the shoulder angle is 40 degrees vs. the 22/250 Remintgon 1.912" case length with shoulder angle of 28 degrees. Trim length I'd say is 1.882 on the AI version.

First know the chamber length. Find out with a sinclair chamber length gauge/plug, it’s real easy. Don’t go trimming brass until you know the chamber. And brass will shorten some during fireforming.

 

[358WCF]

The case length on the 22/250 Ackley Improved is 1.892" and the shoulder angle is 40 degrees vs. the 22/250 Remintgon 1.912" case length with shoulder angle of 28 degrees. Trim length I'd say is 1.882 on the AI version.

Curious... What happens to the end of the neck when a piece of new brass which is close to the 1.912" spec., or even the 1.902" trim-to spec is chambered? In my Ackleys the brass gets .020-.040", or more, shorter after fireforming, but that initial crimp on the bullet doesn't sound optimal even though it may only be for a nano second.

 

[std7mag]

I've been trimming to the parent case spec for my Ackleys.
After fireforming it takes 2-3 reloads before they get to that length.
Then i check trim length with a Lee case length gauge after every firing.
Some metal is taken off with each trim, but not as much as with the parent case.

 

[284winner]

Curious... What happens to the end of the neck when a piece of new brass which is close to the 1.912" spec., or even the 1.902" trim-to spec is chambered? In my Ackleys the brass gets .020-.040", or more, shorter after fireforming, but that initial crimp on the bullet doesn't sound optimal even though it may only be for a nano second.

Yep factory AI gets smaller but in the case of the 22-250, the AI is an over all shorter cartridge to begin with per chamber spec than the standard 22-250. Never had any issues with brass but I think I've only trimmed it one time in maybe 10 firings of each piece.