K & M expandrel mandrel kits

[Richard Coody]

Anyone using one of these.

I ordered one with the .001, .0015 and..002 neck tension. Hope it helps with neck tension and concentricity

 

[Clucknmoan]

Ordered some last week, should be here tomorrow!

 

[T-shooter]

I only have the one that I use to expand before I neck turn. Normally it leaves about .0005" neck tension measured on a turned neck O.D. before and after seating a bullet. I have a .3075" reamer and it's a perfect match. I can turn it with a bit of force with my fingers and it cuts loose any excess carbon without removing any metal unless there is a donut. Be sure to set them up with the long screw so it doesn't bottom out into the necks. The one I have is the standard expander for a .308 and it measures .3085" allowing for some brass springback. I may have to get a couple more because sometimes the brass doesn't spring back the same, especially after annealing. I use inserts in my Lee press and leave them a little loose (wiggle room) to allow the mandrel to self center. It seems to eliminate any runout.

 

[500Stroker]

Anyone using one of these.

I ordered one with the .001, .0015 and..002 neck tension. Hope it helps with neck tension and concentricity

Please send a link I may order one myself
Thanks

 

[T-shooter]

http://kmshooting.com/case-neck-expanding/expanding-mandrel-kits.html

You'll need at least one press adapter, one for each size would be better.

 

[Willie]

I have them set up for 5-6 rifles, using the under sizes and the expander for turning. Just a couple of tips for new users ---- I don't use the screws, just adjust depth by looking thru the window on the press adapter. I use a few wraps of Teflon tape to snug up the thread on the mandrel holder, to keep it from moving in the adapter, after setting depth.

I also label each adaptor as to the size mandrel installed. It's easy to get the wrong one (don't ask). I like to neck size at least .0005" smaller than mandrel target and apply dry lube, prior to expanding.
Because of spring back, you will notice some variance in mandrel resistance. I will usually set the loose ones aside and resize the necks and expand again.

Hope this helps someone.

 

[Ray B]

I haven't used the sizer but I do use their press. I had a difficulty with the first press and K&M sent a replacement part and a pre-paid shipping label for the problem part. Great press, Great customer service.

 

[T-shooter]

I have them set up for 5-6 rifles, using the under sizes and the expander for turning. Just a couple of tips for new users ---- I don't use the screws, just adjust depth by looking thru the window on the press adapter. I use a few wraps of Teflon tape to snug up the thread on the mandrel holder, to keep it from moving in the adapter, after setting depth.

I also label each adaptor as to the size mandrel installed. It's easy to get the wrong one (don't ask). I like to neck size at least .0005" smaller than mandrel target and apply dry lube, prior to expanding.
Because of spring back, you will notice some variance in mandrel resistance. I will usually set the loose ones aside and resize the necks and expand again.

Hope this helps someone.

What's wrong with using the screw for setting the depth?

 

[rardoin]

What's wrong with using the screw for setting the depth?

Nothing really. I use a windowed riser because I don't like the screw head banging on the flash holes if I pull the ram too far. I set the die to cam over and still have about .100" clearance between the mouth and die base. Either way works.

 

[T-shooter]

Nothing really. I use a windowed riser because I don't like the screw head banging on the flash holes if I pull the ram too far. I set the die to cam over and still have about .100" clearance between the mouth and die base. Either way works.

Thanks!

 

[Willie]

Nothing really. I use a windowed riser because I don't like the screw head banging on the flash holes if I pull the ram too far. I set the die to cam over and still have about .100" clearance between the mouth and die base. Either way works.

This ^^^^^