Lyman 457132 535 grain postell

Discussion on Bullets and Bullet Lubes, Casting, Swaging, Paper Patching, and Lube Cookies.
shovel80
PostsCOLON 153
JoinedCOLON Sun May 29, 2011 11:39 am
LocationCOLON Sonora,CA

Lyman 457132 535 grain postell

Post by shovel80 » Sun May 20, 2012 9:35 pm

I've been using a Lyman 535 Grain postell mold for many months now...to get good bullets I normally run 20-1 mix at about 740-750 degrees with this mold. That's where they look good and just drop out of the mold. If I'd let the melt get any hotter, I'd get "Whiskers" from the vent lines..

I found another Lyman of the same number as used , like new and bought it...Not sure why, just wanted to compare bullet measurements I think because I always thought the first mold was a litle small..

Today I tried the second mold, and I had to bring the temp up to about 800-820 degrees to get good fill out, and that's when the bullets started to just fall from the open mold.

With the first mold, I normally average 533-534 grain bullets...and with the second mold, I am getting about 547-548 grain bullets...

The bullets measure possibly .005 larger with the second mold, would that cause the much heavier bullet, or maybe because of the Higher heat the second mold seems to need to work correctly?

Terry :D

John Boy

Re: Lyman 457132 535 grain postell

Post by John Boy » Mon May 21, 2012 6:10 am

Terry, the only difference between the 2 molds should be the Lyman CNC cutter they used. I've heard that they try to keep the cutter variance within a 0.002 spec. Cast a couple more sessions with the new mold at a lower temperature to see the results. New molds need to be broken in.

I ran into the same issue with a BACO mold where the bullets were dropping under weight. After 2 or 3 casting sessions, the mold cast the correct weights

User avatar
montana_charlie
PostsCOLON 1413
JoinedCOLON Sun Nov 20, 2005 8:35 pm
LocationCOLON West of Great Falls, Montana

Re: Lyman 457132 535 grain postell

Post by montana_charlie » Mon May 21, 2012 9:29 am

John Boy wroteCOLONTerry, the only difference between the 2 molds should be the Lyman CNC cutter they used.
I don't know anything about how Lyman makes moulds, but a lot of people think they still cut their cavities with cherries.

CM
Retired...twice. Now, just raisin' cows and livin' on borrowed time.

Lumpy Grits
PostsCOLON 171
JoinedCOLON Sun Dec 24, 2006 3:06 pm
LocationCOLON The Mojave Desert...... Palmdale, Ca. U.S.A.

Re: Lyman 457132 535 grain postell

Post by Lumpy Grits » Wed Sep 05, 2012 3:17 pm

.005 larger :?:
That's out of Lyman's specs.
I would call Lyman CS.
LG
"Having you along, is like losing two good men"

AlmostAQuigley
PostsCOLON 4
JoinedCOLON Thu Aug 03, 2006 12:38 pm

Re: Lyman 457132 535 grain postell

Post by AlmostAQuigley » Thu Sep 06, 2012 8:45 am

Lumpy Grits wroteCOLON.005 larger :?:
That's out of Lyman's specs.
I would call Lyman CS.
LG
Gary has a good point here. That said, I believe Lyman still uses a "cherry" to cut the cavities in their moulds and a certain amount of variation is the norm in utilizing that manufacturing technique. One sees lots of posts re the variability in quality and dimensions of Lyman moulds on many different on-line BPCR fora.

Buffalo Arms, however, uses CNC machining. At least that is what Dave Gullo told me when we chatted about BACO moulds at the Quigley this year.

Give Lyman customer service a call; they are usually very helpful.

JR
Owner of a Shiloh 1874 Hartford, 34 inch heavy barrel, patchox, etc... well, "almost a Qhigley model".

Lumpy Grits
PostsCOLON 171
JoinedCOLON Sun Dec 24, 2006 3:06 pm
LocationCOLON The Mojave Desert...... Palmdale, Ca. U.S.A.

Re: Lyman 457132 535 grain postell

Post by Lumpy Grits » Mon Sep 10, 2012 8:25 am

The 2 Lyman moulds I had were JUNK :!: .....
Get a Paul Jones #45001 Creedmoor mould.
http://www.pauljonesmoulds.com/
LG
"Having you along, is like losing two good men"

shovel80
PostsCOLON 153
JoinedCOLON Sun May 29, 2011 11:39 am
LocationCOLON Sonora,CA

Re: Lyman 457132 535 grain postell

Post by shovel80 » Sat Nov 17, 2012 7:38 am

Actually, the .005 Larger should have said .005 Longer!

Terry :D

Rolling45-70
PostsCOLON 4
JoinedCOLON Tue Dec 22, 2015 6:06 am

Re: Lyman 457132 535 grain postell

Post by Rolling45-70 » Thu Mar 17, 2016 8:56 am

have asking in other forums about a similar "problem " i got with my Postel Mould

It drops very fine Bullets by 458/459 inch but they weight 490 / 492 grs only
i use a 1:30 Alloy ( Rooftop Lead and a bit Tin)

It`s the 4 GG Version. I was aware that Lyman has made a 475 grs version with 3 GG and the 4 GG Version with 530 / 535 grs.

Seems that i have a Version out of a very old Lyman Catalog i found on the Net with a 490 grs Version

Any imput are most welcome

regards Klaus

BUTTON_POST_REPLY