Lyman 429421 Sizer die?

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tek4260

Buckeye
Joined
May 31, 2008
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1,886
Location
carroll county ms
What would be the proper size sizer die to use with this mold? Will be shot in a 50th ann Flattop. I am leaning towards the Lee press mounted sizer and pan lubing with home made lube. Should it be sized to .429 or .430?

Thanks
 

Rick Courtright

Hawkeye
Joined
Mar 10, 2002
Messages
7,897
Location
Redlands CA USA
Hi,

My experience w/ the 429421 is secondhand: a buddy uses that mould and sizes his bullets to .430" to use in his 629 S&W...

Dunno if he's ever slugged his barrel, but conventional wisdom as I learned it says go 0.001" over jacketed size for cast bullets if you haven't slugged yours, go the same 0.001" over barrel size if you have. Since a jacketed .44 bullet's generally gonna run .429", it seems .430" is a good starting point. If I had to bet on it, I'd think he used the same "conventional wisdom" choosing a sizer...

My buddy's Smiff likes .430's: my RH does too, and I haven't slugged it. We use different molds, but both use the Lee sizer. So I'd say unless you DO slug yours, you could do worse than get the .430" first...

Rick C
 

tek4260

Buckeye
Joined
May 31, 2008
Messages
1,886
Location
carroll county ms
Thanks. I was leaning towards that, but I am new at this and would rather ask first. Now I just have to shoot up the 1500 240LSWC's I already have! Hope this Lyman die casts as good as the 325K 45 die I got from Veral.
 

sixshot

Buckeye
Joined
Aug 20, 2006
Messages
1,835
Location
soda springs, idaho
You've got a great, proven mould. I size to .431" for all 7 of my 44 caliber guns. Take one of your slugs & drop it down each cylinder throat, make sure its lined up & you should be able to push that .430" slug right on through, you want a snug, push thru fit.

Dick
 

GP100man

Buckeye
Joined
Sep 13, 2006
Messages
1,386
Location
Tabor City, NC.
Three44s
i`ve always been told ya want bigger cyl holes than bore for lead , so i slug then i ream .001 larger then size .001-.002 over that & it`s worked for me , now i`ve found out `bout taylor throatin ???
 

txpete

Bearcat
Joined
Jan 3, 2003
Messages
36
Location
ft hood TX
429421005.jpg


429421 sq. lube grooves

my cast 14 bhn and sized .429.in my 50th no problems,no leading and very accurate.
 

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