expander mandrel

[kriller134]

Do I need an expander mandrel? I'm using whidden dies with a .289 bushing without the expander ball. My understanding is that it pushes all of the inconsistencies to the inside of the neck? So, if it does that, then I would need to get the inconsistencies back out right? And using a mandrel expander would do that or would the expander ball take care of that if I put it back in?

[longrange1]

friends dont let friends neck size only!

if you are turning necks and have a tight neck chamber then neck sizing is ok...personally id still FL size...but if your running unturned brass in a factory chamber then id suggest you just save yourself the hassles and FL size.

to answer your question...yes to all.

[kriller134]

friends dont let friends neck size only!

if you are turning necks and have a tight neck chamber then neck sizing is ok...personally id still FL size...but if your running unturned brass in a factory chamber then id suggest you just save yourself the hassles and FL size.

to answer your question...yes to all.

Thanks longrange! I am FL sizing. I'm loading 6.5 creed. So why is the mandrel better than the expander ball?

[OpenSightsOnly]

Using a mandrel after sizing the brass ensures a consistent ID of the neck, that brings about a consistent neck tension for your brass lot.

FWIW, brass quality (in this case, consistency of neck wall thickness) matters, it's not just the dies.

[longrange1]

Thanks longrange! I am FL sizing. I'm loading 6.5 creed. So why is the mandrel better than the expander ball?

[longrange1]

also to add to the above bushings do not size the entire neck they stop just short of the neck shoulder junction which causes brass to build up just above the neck shoulder junction.

like ive said before ive done all the brass and bullet prep work and in the end it does not matter unless your a bench rest shooter and even then im not so sure how much it matters as theres been several records shot without any prep work.

[kriller134]

[longrange1]

[kriller134]

[kcstott]

that shows he has his reloading technique down, and Knows WTF he's doing.

On the other hand he may have figured out how to hack the Magnetospeed and just makes this stuff up Kidding man just kidding,

best ive done is a sd of 9

[longrange1]

[kcstott]

It's a terminology thing But I find nothing inherently accurate, That said ( and here's the terminology thing) I do believe in inherent efficiency and consistency which eventually equals potential accuracy. and by potentially i mean taking the weapon and and the loose nut behind it into consideration. Don't get me wrong, I think we are on the same page, it's just semantics

The term "Inherent accuracy of a cartridge" is like nails on a chalk board to me, But thats from reading 1980's-1990's gun rags that had to promote the next best thing. Hearing it at the gun range from people that couldn't hit 50% of the time, Inherent accuracy was thrown around like "Tactical" in the last few years and there is nothing Tactical about a rifle.

[LynnJr]

Kriller134
Here is a simple way of lowering your extreme spreads.

As you slowly increase your powder charge your extreme spreads will drop then start spreading out again.
As they are dropping you watch on the chronograph to get them at there lowest deviation.
Once you are at the lowest number if the extreme spread is above 30 FPS it's time to change primers. The primer has a huge affect on extreme spread so try everything that will fit.
If your extreme spreads are still not as low as you want them uniform the primer pockets and the flashhole.
If they still are not single digits and your trim length is good and your neck tension is good start playing with your seating depth.
If your extreme spreads are just crazy big your powder choice is wrong.

[longrange1]

It's a terminology thing But I find nothing inherently accurate, That said ( and here's the terminology thing) I do believe in inherent efficiency and consistency which eventually equals potential accuracy. and by potentially i mean taking the weapon and and the loose nut behind it into consideration. Don't get me wrong, I think we are on the same page, it's just semantics



The term "Inherent accuracy of a cartridge" is like nails on a chalk board to me, But thats from reading 1980's-1990's gun rags that had to promote the next best thing. Hearing it at the gun range from people that couldn't hit 50% of the time, Inherent accuracy was thrown around like "Tactical" in the last few years and there is nothing Tactical about a rifle.

[longrange1]

Kriller134

Here is a simple way of lowering your extreme spreads.



As you slowly increase your powder charge your extreme spreads will drop then start spreading out again.

As they are dropping you watch on the chronograph to get them at there lowest deviation.

Once you are at the lowest number if the extreme spread is above 30 FPS it's time to change primers. The primer has a huge affect on extreme spread so try everything that will fit.

If your extreme spreads are still not as low as you want them uniform the primer pockets and the flashhole.

If they still are not single digits and your trim length is good and your neck tension is good start playing with your seating depth.

If your extreme spreads are just crazy big your powder choice is wrong.