Wrong made sizer die.

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  • Last Post 29 June 2017
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BigMan54 posted this 26 June 2017

Discovered something different in a new LYMAN Lube-Sizer die today. Had to buy a new .356 sizer die for my old LYMAN 450 Lube-Sizer, when I discovered the old one had gone missing.  Got a new LYMAN one a few months ago, unpacked it into the big cigar storage box. Didn't check anything but diameter stamping. 

Finally starting to lube-size some of the bullets I cast this past winter/spring. 

Set up to lube-size some 9mm from a LEE 356-125-2R last March.  Started adjusting the depth & discovered the " I " part of the sizing die had a CONCAVE TOP. Is this normal for new H&I sizer dies ? Wonderful place to store extra lube,  on the base of the bullet. Neither of my other 2 new LYMAN sizer dies in .311 & .314 have concave tops on the " I " pin/shaft(?).  Am I being pickier than usual?  

 

Long time Caster/Reloader, Getting back into it after almost 10yrs. Life Member NRA 40+yrs, Life S.A.S.S. #375. Does this mean a description of me as a fumble-fingered knuckle-draggin' baboon. I also drool in my sleep. I firmly believe that true happiness is a warm gun. Did I mention how much I HATE auto-correct on this blasted tablet.

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R. Dupraz posted this 26 June 2017

I don't know about the lyman but I have had a Saeco lube sizer since the "60's" and have accumulated a variety of sizing dies since then. The push pins in all the sizing dies are concave on  one end such as you have described. With the Saeco anyway, this  provides a space for any tiny bit of excess lube to go so that the bottom of the GC is seated perfectly flat and smooth on the base of the bullet.

The opposite end of these Saeco pins are flat without the dimple and don't seat GC's as flat and uniform as the concave end.   

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Duane Mellenbruch posted this 26 June 2017

Some folks pay extra to have that modification done to the push out pin.  Seems like it keeps the base of the bullet flat against the outer edge of the pin for less lube build up under the base of the bullet when lube sizing.  That is a nice feature if you are not getting perfectly cut flat bases when cutting the sprue. 

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R. Dupraz posted this 26 June 2017

My casting routine is such that all my cast bullets drop from the mold with perfectly flat bases, no sprue protrusion  and the checks are still seated flatter and more uniform when seating GC's with the concave end of the push pin in my Saeco. This seems to be more evident when using softer Checks. 

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GP Idaho posted this 26 June 2017

I'm also a Saeco lube sizer owner. Great tool and yes the pins are concave. I agree with Richard and Duane, That's the way the pins should be made for the reason mentioned. Gp

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BigMan54 posted this 26 June 2017

Well Guys, thanks for your input. After I read all your posts I checked every sizer die that I have. Both RCBS & LYMAN.  Most of the older LYMAN & all the RCBS are slightly concave but most all the new LYMAN'S are flat. I guess I never noticed the Difference. I understand the reasoning for a concave base, as to a bit of "extra sprue" on the base of the bullet. So a concave base in a sizer die will allow a bullet base to still sit squarely on the die base. I don't have that problem as I have well fitted sprue plates on all my molds, so my bases come out cut off clean & flat.

Never had a SAECO Lube-Sizer,  only RCBS & LYMAN.  With SAECO offering top punches to fit LYMAN/RCBS, I never saw the need to get a SAECO too.  

I get a deeper understanding of casting & shooting with every post I read.

Been going through some of the old ones. Ed Harris' one on polishing your bore with TURTLE WAX chrome polish & a pull thru is pretty interesting. 

Long time Caster/Reloader, Getting back into it after almost 10yrs. Life Member NRA 40+yrs, Life S.A.S.S. #375. Does this mean a description of me as a fumble-fingered knuckle-draggin' baboon. I also drool in my sleep. I firmly believe that true happiness is a warm gun. Did I mention how much I HATE auto-correct on this blasted tablet.

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Larry Gibson posted this 27 June 2017

Bought my first H&I sizer in early '68.  I currently have 30 of them and have let several more go over the years in trades.  All of them have I dies with a concave face.  I have picked up used ones in the past that obviously were cleaned and had the I die in upside down which gave a flat face with slightly beveled edges.......not good btw as the bevels force lube under the bullet.......

 

LMG

Concealment is not cover.........

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harleyrock posted this 28 June 2017

"Well Guys, thanks for your input. After I read all your posts I checked every sizer die that I have. Both RCBS & LYMAN.  Most of the older LYMAN & all the RCBS are slightly concave but most all the new LYMAN'S are flat. "

I checked all of my Lyman H&I dies and only the oldest one (30 yrs. + -) was concave.  A RCBS set (which fits the Lyman 450) less than a month old was flat.  They were all beveled on the other end.

"Been going through some of the old ones. Ed Harris' one on polishing your bore with TURTLE WAX chrome polish & a pull thru is pretty interesting. "

I believe that Turtle Wax Chrome polish technique was conceived by Onadaga.

Lifetime NRA since 1956, NRA Benefactor, USN Member, CBA Member

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BigMan54 posted this 29 June 2017

My apologies to Gary for failing to give him proper credit.  

Long time Caster/Reloader, Getting back into it after almost 10yrs. Life Member NRA 40+yrs, Life S.A.S.S. #375. Does this mean a description of me as a fumble-fingered knuckle-draggin' baboon. I also drool in my sleep. I firmly believe that true happiness is a warm gun. Did I mention how much I HATE auto-correct on this blasted tablet.

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