UNDER size sizing dies.

[CWLONGSHOT]

Im not the biggest LEE fan. Not a "bulge buster" fan either.

But this came recommended by someone I respect.

Lee Precision, Inc.. Undersize Sizing Dies

Lee Undersized Carbide Sizing Dies are .003" smaller than our standard Carbide Sizing Dies.

leeprecision.com

Any one using them? I see a couple calibers. Id like a 10mm maybe as well.

CW

 

[JonB]

It seems most of us cast bullet shooters would like a Carbide pistol case size die that is about .002 larger ?

 

[JonB]

also, I "am" a fan of the Lee bulge buster, for all the 40 brass I find in the grass at the range

 

[fiver]

I don't know why anyone would want to 'coke bottle' their brass anymore than it gets now.

I don't know why the world can't agree on a brass thickness and stick with it, so the die manufacturers can agree on an internal diameter for their die sets.

 

[RBHarter]

I had this 06' that almost drove me to a SB die ...........

Sadly my Ruger w the .454 throats is the small 45 Colts .

 

[CWLONGSHOT]

My friend has it for the 38 Super and couldnt speak highly enough about it.

If ya have one ya know what happens. Its almost like sizing "machine gun" ammo. But the pockets are most usually fine. The std die dosnet size down enough. They are not bulged , well yea they are but mot at all like a "Glock smile" bulge they are "swelled" and a reg die wont size them.

CW

 

[Intel6]

Very commonly used by pistol competition shooters, especially in 9mm but also other calibers. Commonly reccomended for tight chambers and when having bullet setback issues.

 

[Missionary]

..... And for all those undersized steel sizers we have a wood dowel, black abrasive cloth and a towel on the pants leg.
The carbide dies in our house have not been used for a long time unless by accident one comes within .002 of a chamber.

 

[RicinYakima]

I have found the old Lee carbide dies from the 1980's are larger than the new ones. The early 38 Auto die will size a 38 special case to about .355" or .356" inside diameter depending upon case brand. FWIW

 

[Ian]

I use a decade-old Lee .38 Super carbide die to resize the exceptionally thick military. 38 Special cases.

 

[CZ93X62]

I have gone to steel dies in 45 Colt and 44 Magnum due to shortened case life and coke-bottle finished ammo. The 45 Colt T/C die sizes my 45 ACP and AR brass now at a semi-decent .469", and the 45 ACP T/C sizer is retired.

Glocked brass is an eventual invite to a kB, and is most prevalent in 40 S&W and 10mm pistols of earlier generations. Hot-rodding either caliber will exacerbate that guppied aspect. The real solution is an aftermarket barrel with better case head support, but backing off the 180 grainers to 925-950 FPS in 40 S&W and 1100-1125 FPS in 10mm will minimize the effect in OEM barrels. Win STHP loads and reloads that mimic them (175-180 grainers @ 1225-1250 FPS) call for aftermarket barrels.

 

[hrpenley]

Im not the biggest LEE fan. Not a "bulge buster" fan either.

But this came recommended by someone I respect.

Lee Precision, Inc.. Undersize Sizing Dies

Lee Undersized Carbide Sizing Dies are .003" smaller than our standard Carbide Sizing Dies.

leeprecision.com

Any one using them? I see a couple calibers. Id like a 10mm maybe as well.

CW

I use the small base sizer dies on 308, 450bm, 9mm and 45, been thinking about the 223 but just never had any issues at all with them, it did improve the feeding in my firearms but for the rifle you got to use a good lube - imperial or royal, I am sure there are others that work but those 2 I found work well and I haven't tried any other (high end/high pressure types) yet, - still have plenty of those left. lee or one shot lube's - forget it. I also have a couple of X-dies small base but haven't noticed any real dif - the X-die is suppose to reduce the trimming but I don't think it does much. (as far as the trim thing).

 

[hrpenley]

More often than not from my experience (at lease on the pistol cal, a slightly off-centered bullet seating can cause same type of feeding issues) - little more bulge on 1 side than other.. need m-type expander die to fix those issue - don't count on the lee universal or the powder neck expander that comes in the sets - get a good one. If using a small base die this becomes more apparent when visually inspecting the finished round. you will be able to see if you are setting your slug centered or not.

 

[hrpenley]

A little trick I learned if anyone interested - this works for pistol bullets well - it is however time consuming so unless you really want to get the best you can this may be a little more than you want but - expand you neck to just take the round - chamfer the inside and outside of the brass, (in that order-if not you will discover why ) slip you brass fully into your case check gauge - insert the slug from the top - I use a small brass hammer with hard plastic end - ever so lightly tap your bullet, holding the case in from the bottom (very light tap you just want to seat it enough to hold in place- may take a little practice) the bullet will drop cleanly and aligned ready for seating in your die, this will align your round about as well as can be done without a lot of high dollar hardware and you will end up with a well centered round. This works very well with large cal like 45/10mm etc. flat base slugs seem to be the worse offenders for this I think.

 

[hrpenley]

Not sure if I need to add this but between the chamfer and seat - make sure you put the powder in......... unless of course you like to dig slugs out of your barrel that is...

 

[Charles Graff]

No gracias!

 

[Bisley]

My experience is that almost all carbide sizing dies are .003 inch undersize to begin with. Is Lee trying to unload more factory seconds as a great new idea again?

Just wondering...

 

[CZ93X62]

My experience is that almost all carbide sizing dies are .003 inch undersize to begin with. Is Lee trying to unload more factory seconds as a great new idea again?

Just wondering...

At least that much under sized, in the .40"+ calibers. .467" sizing in 45 ACP and .469" sizing in 45 Colt is RIDICULOUS. Curiously, a 1980 RCBS T/C 38/357 sizer creates brass at .379" just like it is supposed to.

 

[Bisley]

CZ -
I had a set of steel dies in .38 Special many years ago, and I used to clean them like my revolver cylinders after each use. Seldom a problem. When the dies scratched cases, I would run a strip of crocus or emery cloth or 400 grit sandpaper (1.5 inches wide) over a pair of long handled tweezers, run them into the die, (tight fit) and turn the die body back and forth in my hand several times before cleaning with a swab and Hoppes #9. The gun rag "Notsuppostas" would have a fit, I suppose, and admonish me for creating outsized cases. Never had a problem in my Colt Officer's Model Match. Wish I still had those dies...

 

[hrpenley]

Well if you don't have to jam it down the barrel and when you pull the trigger something comes flying out the end and no where else and lands pretty much where you want it to, doesn't really matter so much how you get there. If it works for you don't fix it, if not probably someone here that can put you on the road to fixing it.