243 wilcat???

[ktoney]

OK here is what i want 243AI but with .350 long neck

what would be best way to achieve this? idea is to push neck back not fire form.

Would a standard 243AI die allow me to do this or would i need to grind bottom of die to get result?

So im looking for 40 degree shoulder but longer .350 neck

Similar to 243BR-K and 6SLR but with steeper shoulder and longer neck

Idea on how best to get there?

TIA

 

[Rtheurer]

Wow thats a long neck. Mind if I ask you what your thought is on using that long of a neck.

Ive been shooting Robert's 6SuperX ( now 6mmLR I believe) which uses a 30* shoulder and .305 neck just like the 6XC. just grab some Winchester 243 Brass and shove it into the 6XC die and your pretty much done. That is a Rudamentry discription but its pretty easy.

In my experience so far ( and thats not worth much) Im not seeing a huge advantage of the super long neck. Its nice for those super long 115's but that is about it. Donut problems are the order of the day if you use Lapua brass which is thicker in the shoulder than Domestic brass. You are now making ALOT of neck out of what used to be shoulder. Kinda makes sense that it would be thicker there. So that means turning a bunch of brass. Maybe twice per case to get it right.

Im intrested to hear your thoughts, Good Luck
RussT

 

[TheBlueEyedBear]

I am also shooting the RCW 6mm Super LR cartridge. I really like what Robert has done with the standard .243 case. The ability to shoot a variety of the 6mm heavy bullets is a real plus.
However; thinking of the 6mm bullets on the market, I don't know what you may be wanting to shoot that would require such a long neck?? I'm curious to here what you are going to do with this.

 

[mikecr]

Lee Six used to offer a nice forming die set. i think Neil Jones is making it now(www.neiljones.com).
You can never fully form anything without a firing though. So don't think you'll save barrel life with this.
This is what I'd do; To begin

Form the longer neck(with forming die bushings). Run a Sinclair expander mandrel through it and turn to ~12thou thick all the way down onto the new shoulder area(turn out the doughnut). Depending on your chamber, you might re-expand and partial neck size to form a false shoulder for fireforming.

Now fireform to reduce the body taper and leave a 40deg shoulder.

 

[ktoney]

Think i found what im looking for 6mm LSI
any idea who got reamer for it etc

Longer neck saves throat
since standard 243 is known barrel burner reducing case capacity a lil and going to 40 degree shoulder plus long neck, plus salt nitride barrel treatment
Again sure it wont be fit to chamber but pushing neck back ala 6 BR-K/6SLR, should a lot better than say true fire forming ie 243AI
True i could just run 243 case thru 6.5x47 body die, which i have done same thing as
6SLR. However i want the longer neck and steeper 40` shoulder

 

[Rtheurer]

Toney
Thats great that you found what your looking for. It would be hard to Not find some variation of the 243 that has not been done yet.
Should be a great cartridge for you. Its a;ways fun to have something a little diffrent than the rest of your buddies. If this is your first wild cat it will be learning experience thats for sure. It will either move you into more wildcats or if you have a bad experience you may say to heck with all that work and go back to something easier.
Based off what I learned the 243AI is easier to make than what your about to try. both need to be fireformed and its pretty easy to jamb a bullet into the lands and pull the trigger on an AI blowing the Shoulder Forward Vs pushing the neck and shoulder back with a die and then fire forming.
Im also not completely sold that this Long neck extends throat life either. I have yet to see any hard Data for myself or anyone else for that matter. Another Wivestail? Should be a fun project nonetheless. Best of Luck
RussT

 

[ktoney]

Nope no fire forming, neck is pushed back same as 6 SLR etc not blown forward ala AI

 

[mikecr]

Toney, I can tell that you're not going to learn anything from us.
You're just going to cling to notions of grandeur..

The neck is still part of the case's capacity, and combined with improving the 243 shoulder, the capacity will go UP a couple grains over an already barrel burner. You are not replacing throat with neck. The throat will still be there, right where it always is.
Also, ALL cases gain in capacity on first firing, and so there is ALWAYS the fireforming to do before any load development can begin.
You will not increase barrel life with it.
The only thing you gain is reduced trimming, provided you reduce the body taper(on fireforming).

 

[ktoney]

Toney, I can tell that you're not going to learn anything from us.
You're just going to cling to notions of grandeur..

The neck is still part of the case's capacity, and combined with improving the 243 shoulder, the capacity will go UP a couple grains over an already barrel burner. You are not replacing throat with neck. The throat will still be there, right where it always is.
Also, ALL cases gain in capacity on first firing, and so there is ALWAYS the fireforming to do before any load development can begin.
You will not increase barrel life with it.
The only thing you gain is reduced trimming, provided you reduce the body taper(on fireforming)

Hmmm seems by having an ability to think for my self and have my own preferences i may of upset someones sense of importance
notions of grandeur???? bro go take some midol

The longer necks coupled with a 30 or 40 degree shoulder angle are supposed to angle the hot plasma gases away from the throat of the bbl. I believe the originator of the theory called it the TP or turbulence point. The fellow was actually a rocket scientist and the theory was based on rocket nozzle design.
So when you look at cases like the 243 with 20 degree shoulder, they are deemed bbl burners. Many cases copy the 6mm BR due to it's long neck and 30 degree shoulder angle (6XC also) not only for accuracy but longer bbl life.
In the end, cartridges that burn a lot of powder for their bore size are going to be hard on throats, ie 6mm rem with its super long neck (.351) and 10gr case capacity advantage over the 243, routinely gets better barrel life than the 243.

Not sure wot your yapping about or how i upset your delicate sensibilities, nor do i care...the above quote came from this website
Dont associate my low post count for lack of expertise or experience in shooting sports and reloading etc
Yes the neck is part of overall case capacity, however space occupied by bullet cant be used by powder, concept here is to slightly reduce case capacity.
Forgive me if i dont jump up n down like a giddy school girl at your every word

peace out