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Casting with double cavity molds (Read 10920 times)

westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Casting with double cavity molds Mar 7^th, 2016 at 1:42am	Print Post
	Looks like we must buy a double cavity mold in the .321 - 323, NOE .321 187 group buy. I hate double cavity molds and never use both cavities when casting. For me they are a royal pain in the butt. How do you guys manage them when using both cavities? Joe.

	A blind squirrel runs into a tree every once in a while.
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Jeff Houck Junior Member Offline Posts: 78 Location: Pocatello Joined: Jan 11^th, 2014	Re: Casting with double cavity molds Reply #1 - Mar 7^th, 2016 at 1:56am	Print Post
	I use a bottom pour pot so multiple cavities are not a problem. Are you ladle casting?

	Jeff Houck
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Casting with double cavity molds Reply #2 - Mar 7^th, 2016 at 2:09am	Print Post
	Yes, ladle. No bottom pour pot. Tried one a long time ago. Didn't work for me. Joe.

	A blind squirrel runs into a tree every once in a while.
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uscra112 Frequent Elocutionist Offline Posts: 4079 Location: Switzerland of Ohio Joined: May 7^th, 2007	Re: Casting with double cavity molds Reply #3 - Mar 7^th, 2016 at 2:21am	Print Post
	My Lyman ladle holds enough to fill both cavities with plenty left over. At least for 200 grain .38 caliber, which is a big as I go. The few times I've tried using just one cavity, I had to work much harder at keeping the mould hot. Time to fill the second cavity is only 2-3 seconds.

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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Casting with double cavity molds Reply #4 - Mar 7^th, 2016 at 2:31am	Print Post
	Where I have problems is keeping lead out of the second cavity while pouring the first cavity. When using one cavity only, wind up with all sorts of partial bullet parts from the second cavity. Joe.

	A blind squirrel runs into a tree every once in a while.
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Schuetzenmiester Frequent Elocutionist Offline Posts: 6707 Location: Cool Wet Side of WA Joined: Apr 27^th, 2008	Re: Casting with double cavity molds Reply #5 - Mar 7^th, 2016 at 4:15am	Print Post
	I ignore the 2nd cavity. If a little lead gets in, it goes back in the pot, but that doesn't happen very often. Practice, practice, practice. works for casting, offhand and wind reading; not so much for bench shooting

	"some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence
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RayH Oldtimer Offline Posts: 757 Location: Oldest City, FL Joined: Jan 4^th, 2012	Re: Casting with double cavity molds Reply #6 - Mar 7^th, 2016 at 6:58am	Print Post
	Keep working on your ladle technique. Before you know it, you'll find the rhythm and your production will improve with better bullets in less time. At least it has worked well for me with my NOE .258/120 PB, 2 cavity, brass, ............ casting 20-25:1, @ 750 degrees +, Lee pot (no bottom pour), Lyman ladle. Results are very consistent.

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SSShooter Frequent Elocutionist Offline Posts: 2942 Location: Southern NJ Joined: Aug 1^st, 2010	Re: Casting with double cavity molds Reply #7 - Mar 7^th, 2016 at 8:29am	Print Post
	westerner wrote on Mar 7^th, 2016 at 2:31am: Where I have problems is keeping lead out of the second cavity while pouring the first cavity. When using one cavity only, wind up with all sorts of partial bullet parts from the second cavity. Joe. The key is to drink after you cast. Not before/during. If you put the spout on your dipper into the hole in the sprue plate while the mould is held sideways and then tip both together it should control the pour and prevent getting lead in the second cavity. At least it works for me. As stated above, 32cal is about as big as I would want to go with a 2-cavity mould as I find them too heavy in the larger sizes and wears out my arm.

	Glenn - Stevens 044 1/2, Bartlein SS 5R barrel in 22LR
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Old-Win Frequent Elocutionist Offline Posts: 1825 Location: Minnesota Joined: Nov 24^th, 2005	Re: Casting with double cavity molds Reply #8 - Mar 7^th, 2016 at 8:32am	Print Post
	I'm with you Joe; I hate double cavities. If I get a little lead in the second cavity while pouring the other, it just slows me down. Which cavity do you guys pour first?


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mes Oldtimer Offline Posts: 504 Location: Wisconsin Joined: Apr 17^th, 2004	Re: Casting with double cavity molds Reply #9 - Mar 7^th, 2016 at 8:38am	Print Post
	Plug the second hole with something. Drill and tap the sprue plate about halfway thru to hold a plate over the hole.
	« Last Edit: Mar 7^th, 2016 at 8:44am by mes »
	Martin Stenback
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Pentz Senior Forum Member Offline Funf und Zwanzig mit den Hut Posts: 435 Location: Vancouver, WA Joined: Sep 4^th, 2014	Re: Casting with double cavity molds Reply #10 - Mar 7^th, 2016 at 9:20am	Print Post
	As a recent convert to dipping, I find it relatively easy to fill a two cavity mold. Simply angle the wrist so that the whole affair tips forward slightly, rotate the mold 90 degrees, hold the spout against the sprue hole and rotate back. After a two count, repeat with the rear cavity. With the forward tilt any surplus from the front cavity runs forward not backward. Takes longer to describe than to accomplish. I'm nearly as fast as with the bottom pour. The result is far superior bullets with less weight variation. Why did it take so long for me to learn this

	ASSRA Member Yoostabe # 11497
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 12333 Location: Why, out West of course Joined: May 29^th, 2006	Re: Casting with double cavity molds Reply #11 - Mar 7^th, 2016 at 10:22am	Print Post
	I've tried all different techniques over many years. Still a PITA. Seems no matter what I do, cannot keep the lead from getting in the other hole. One of these days will try welding a piece of strap between the sprue holes. Furnace cement? Joe.

	A blind squirrel runs into a tree every once in a while.
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bpjack Frequent Elocutionist Offline Posts: 3780 Location: East Olympia, WA Joined: May 18^th, 2008	Re: Casting with double cavity molds Reply #12 - Mar 7^th, 2016 at 11:31am	Print Post
	Joe Make a new sprue plate with only 1 hole. Maybe NOE can supply one holers. I finally got the hang of a two cavity 25 cal mold by filling the front cavity first with the mold tipped forward enough to keep alloy out of the rear one. Wait for the spru to harden then fill the second cavity. Jack

	People who think they know everything are a great annoyance to those of us who do.
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calledflyer Frequent Elocutionist Offline Posts: 3964 Joined: Mar 9^th, 2015	Re: Casting with double cavity molds Reply #13 - Mar 7^th, 2016 at 12:15pm	Print Post
	I dislike double cavity molds for the same reason Joe. Got one that casts a bullet my rifle sorta likes. Still don't use it. Have another rare one for a .44 that has never seen any lead.


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frnkeore Frequent Elocutionist Offline Posts: 7650 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: Casting with double cavity molds Reply #14 - Mar 7^th, 2016 at 12:29pm	Print Post
	Joe, Just drill and tap a single 8x32 on the plate behind the second hole or beside it and put a little scrap 1/6" stock on it, long enough to cover the rear sprue hole. Shouldn't take long to do. Frank

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