Author Topic: Marty's Arms Molds  (Read 4765 times)

Offline Frozen Run

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Marty's Arms Molds
« on: July 10, 2022, 05:29:40 PM »
I just ordered one of their .750 round ball molds and thought others might be interested in this company. They make .180 up to .750 in .010 increments and 4mm to 12mm, multi-cavity molds, made in the USA, and you may be able to get a full day of shooting with just one or two casts of these behemoths. Here is there .490 rb mold for example:



Free shipping within the US through his website or EBAY store:

https://www.martysarms.com/

This guy has a link to a 10% discount code you can click on and it will take you directly to the website and automatically apply the 10% discount, or you can simply type in "BubbaRountree" at checkout:


« Last Edit: July 11, 2022, 04:19:22 AM by Frozen Run »

Online wattlebuster

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Re: Marty's Arms Molds
« Reply #1 on: July 10, 2022, 10:41:33 PM »
They look good enough im gonna gamble an order a 610
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Offline Gemmer

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Re: Marty's Arms Molds
« Reply #2 on: July 11, 2022, 01:33:42 AM »
Sprues cut with side cutter after the casting is removed from the mold?

Offline Frozen Run

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Re: Marty's Arms Molds
« Reply #3 on: July 11, 2022, 02:09:44 AM »
Sprues cut with side cutter after the casting is removed from the mold?

Yes. There is no sprue cutter on this mold.

To be clear, I don't own one yet as I only just ordered it yesterday. My initial impression from what I can tell researching it online is it is a well made cnc mold.

I'll follow up with results once it arrives.       
« Last Edit: July 12, 2022, 04:39:58 PM by Frozen Run »

Offline Hunterdude

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Re: Marty's Arms Molds
« Reply #4 on: July 11, 2022, 02:50:45 AM »
I kind of like that it does Not have a sprue cutter, I always thought sprue cutters where hard on aluminum molds. If the parting line matches up nice and the balls are nice and round then these might be nice! I will have to go back and look if there is anything that keeps the mold half in alignment besides the hinge?

Update: yes, I see 2 dowel pins in the mold.

Offline Frozen Run

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Re: Marty's Arms Molds
« Reply #5 on: July 11, 2022, 04:43:51 AM »
I kind of like that it does Not have a sprue cutter, I always thought sprue cutters where hard on aluminum molds.

Yeah, I can see what you're saying. The other thing I like about this mold is as BubbaRountree says "You make hay while the sun shines, while things are working and going good you make it as quick as you can", one long pour over a large amount of cavities. I also updated my original post to include a youtube video of Bubba where he offers a link and a 10% discount code from Marty's Molds. 10% off plus the normal free shipping.

I contacted Marty on EBAY where I originally purchased it, he responded in 5 minutes letting me cancel the order so I could go to his website and save the 10%! Super friendly guy to talk to.

Offline JBJ

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Re: Marty's Arms Molds
« Reply #6 on: July 11, 2022, 02:17:13 PM »
Guys,
I happened on this review when visiting the N_SSA forum this morning - https://www.n-ssa.net/vbforum/showthread.php/21737-REVIEW-Marty-s-Arms-roundball-mold
Thought it might be helpful to some of you.

J.B.

Offline Frozen Run

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Re: Marty's Arms Molds
« Reply #7 on: July 14, 2022, 06:35:24 AM »
I just received my .750 caliber multi-cavity mold from Marty's Arms today and I am very impressed! First, that it arrived in 3 days from time of order, the free shipping you receive is priority mail. And second, the quality of the mold is exceptional. Very precise and clean CNC machining, and the machined in dowels as Hunterdude pointed out allows it to lock up very solid. I'll be doing some casting with it in the next couple of days and will follow up with the results and measurements.   

Offline smylee grouch

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Re: Marty's Arms Molds
« Reply #8 on: July 14, 2022, 08:02:57 PM »
BIG ladle or bottom pour?  That will be a lot of lead!  ;)

Offline Telgan

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Re: Marty's Arms Molds
« Reply #9 on: July 14, 2022, 11:14:25 PM »
Let us know what diameter they drop out the molds at. I suspect they will be smaller than .750. I hope I am wrong

Offline Frozen Run

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Re: Marty's Arms Molds
« Reply #10 on: July 15, 2022, 07:39:42 AM »
Smylee, I have a Lee Pro 4-20 bottom pour and am fortunate to own a lot of lead. Lead was dirt cheap about 4 or 5 years ago and I would drive down to my local scrapyard and buy pure lead flashing 100 lbs at a time, the owner thought I had a business or something and would just let me go in the back and pick it out myself, they'd then dolly it out to my car for me. There was one guy who worked there who would always pick out cool stuff for me and I'd bring him in subway because that's what he liked. I'd melt it, skim the slag, cast it into ingots, then store them in empty ammo cans. Anyways, didn't really have a use for any of it until I bought a snaphaunce.

Telgan, I am very new to casting roundball and was curious why you suspect this mold will cast smaller than its designated size? I'll post results after I get some casting done over the weekend.
« Last Edit: July 16, 2022, 05:14:20 PM by Frozen Run »

Offline Frozen Run

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Re: Marty's Arms Molds
« Reply #11 on: July 20, 2022, 10:34:08 AM »
So I just got done with casting some roundball, turns out casting roundball is a miserable time so I'm going to make this quick. Nice mold though the handles on them are too short and the screws will burn you. I'd buy it again. The Lee 4-20 is aggravating to work with, I'm tempted to buy a ladle for it but I'm also tempted to drag my casting bench to the curb, move my lead into deep storage, and memory hole this entire experience.

Sorry, I did not mic these yet.

Online alacran

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Re: Marty's Arms Molds
« Reply #12 on: July 20, 2022, 03:09:24 PM »
I saw these on E-Bay about a year ago. My first though was that that many cavities would be heavy. and the size of the mold would be cumbersome.
I have two Lyman four cavity molds, a .440 and a .451. The math would tell you that 100 pours would net you 400 balls. But usually after about 60 pours I have had enough. the molds get hot and take a long time to cool enough to open. All in all casting balls is not what I would call a fun endeavor.
However, the price of ready-made balls makes it worthwhile.
A man's rights rest in three boxes: the ballot box, the jury box, and the cartridge box.  Frederick Douglass

Offline snapper

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Re: Marty's Arms Molds
« Reply #13 on: July 20, 2022, 03:21:55 PM »
Casting for me is not fun either.   I only cast a few times a year and try to cast a bunch when I do it.

Since it seems that you are just getting started there is a learning curve for casting.   When I started it was frustrating for me as well.  Give it a few sessions and see if it gets better.

Fleener
My taste are simple:  I am easily satisfied with the best.  Winston Churchill

Offline Austin

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Re: Marty's Arms Molds
« Reply #14 on: July 20, 2022, 03:27:11 PM »
Do it again Donnie, it’ll probably go better!!
Eat Beef

Offline Frozen Run

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Re: Marty's Arms Molds
« Reply #15 on: July 20, 2022, 08:07:45 PM »
Alacran, the same amount of pours from one of Marty's .440 molds would net you 1600 balls. Even I was able to consistently fill all the cavities once I was in the sweet spot for lead and mold temp, and I never cast roundball before, so I believe for an experienced caster approaching something near that number is a reasonable expectation. The problem with me giving a review of the product is I don't have any prior roundball casting experience which means I also don't have any experience casting with other brands. So I can't say if it's better or worse than other molds on the market and I can't determine how much of my results were based off of my inexperience.

In regards to cumbersome, the handles are short and you can't get anywhere near those screws, but I can assure you that you very quickly learn how to pick it up and use it without burning yourself. As far as the weight goes, I didn't notice it but I'm a bit cornfed. The nice thing is the length of the mold allows you to rest it completely across the top of your pot when preheating it. I think my biggest issue was that the combination of a bottom pour and multicavity mold is too high speed for a beginner. I think in hindsight I would have been happier filling a Tanner mold from a ladle. I also need to get a digital scale to check for weight consistency in my casting.

All of that being said, I am still very happy with the mold, it doesn't hide what it is and I think people looking at it can determine if it is right for them? I will post some data once I get some more experience under my belt.

Fleener, yes you are absolutely correct regarding the learning curve, I did learn quite a bit already in my first session. So I wanted to cast some roundball last night so I could shoot my snaphaunce this weekend. It was blistering hot and humid at midnight in my garage so I was wearing boxers, crocs, and a t-shirt wrapped around my forehead. The t-shirt is something I use to mitigate sweat droplets, something I learned the hard way from casting ingots. So I was trying to find the sweet spot on my bottom pour between as heavy of a pour as I could get without the pot dripping out the bottom uncontrollably and it starts dripping these tiny little drops that are hitting the base of the unit, splattering, and sending these tiny little hot darts of lead at me. Which was more irritating than anything else but they still hurt cause I'm in my boxers. So I'm dancing around trying to close the valve but all I have is the spine of the paring knife I use to cut wax with as I misplaced the screwdriver I keep on my casting bench. Anyways, that's the thing that kills me about casting is the splatters. This thing splatters everywhere and it drives me nuts. I'm not hypersensitive about things but I also don't want to cocoon the corner of my garage in lead which is what will happen over time if I'm not vigilant about cleaning up after use. So I always take my paring knife and go around and meticulously pick off every tiny little bit of lead like I'm some sort of forensics guy, and without question the pot will release some latent drip when I am completely done and the drip will explode into a million specks of lead that go everywhere.

Austin, thank you for the encouragement, I will be going at it again but this time with a ladle. Being that it is a such a large caliber, my mold only has four cavities, and I think I can control the mold temp while pouring from a ladle? If I ever decide to go back to bottom pouring then I think I am going to need to upgrade to a much better pot.             

Offline smylee grouch

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Re: Marty's Arms Molds
« Reply #16 on: July 20, 2022, 08:40:05 PM »
You say the screws get too hot, so is that while wearing gloves? Wearing gloves while casting is a must IMHO.

Offline snapper

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Re: Marty's Arms Molds
« Reply #17 on: July 20, 2022, 08:44:00 PM »
My casting setup is very stable and very safe.   I even have a fume hood.

I NEVER cast in anything other then jeans, and boots, plus gloves.   If you were to have an accident, you need to protect yourself.

Fleener
My taste are simple:  I am easily satisfied with the best.  Winston Churchill

Online wattlebuster

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Re: Marty's Arms Molds
« Reply #18 on: July 20, 2022, 09:48:13 PM »
Ive been casting since the early 80s. I use welding gloves to cast with. Even the wood handles on other molds get hot after a long session so get yourself some good thick gloves an give er another go an I think it will turn out a tad better. I plan on ordering a 610 from them this week as it looks to be a quality mold. I would like to know how yours measured with a mic
Nothing beats the feel of a handmade southern iron mounted flintlock on a cold frosty morning

Offline Austin

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Re: Marty's Arms Molds
« Reply #19 on: July 20, 2022, 10:25:33 PM »
Glad you didn’t send an action selfie…. Get ya some clothes and welding gloves! Good luck!!
Eat Beef

Offline MJBush

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Re: Marty's Arms Molds
« Reply #20 on: July 20, 2022, 10:28:21 PM »
I also wear an apron. Don’t forget safety glasses either.
Michael

Offline smylee grouch

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Re: Marty's Arms Molds
« Reply #21 on: July 21, 2022, 12:24:28 AM »
Many times during a casting session I will get some degree of lead splash when I cut the spru and the puddle lands in the pot.

Offline yellowhousejake

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Re: Marty's Arms Molds
« Reply #22 on: July 21, 2022, 05:54:36 AM »
A few things to try.

I would try the ladle. I use my bottom pour Lyman 25 lb pot and with alloys and bullets it works great. I have never gotten pure lead to work well with a bottom pour. Especially casting over 200gr.

Cast one side only at first, the mold will be lighter, casting will move faster, and it may not get so hot you have to wait a long time between pours.

Wear an apron. Lead will find a way into shirt pockets if you get a splash. NO amount of dancing will get it out of your pocket.

Wear a face shield. Cooler than glasses and gives side protection as well. I spent a weekend in eye patches once waiting to see if my eyesight was saved. (Not casting related) I am very very careful with my eyes now.

DAve

Offline Frozen Run

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Re: Marty's Arms Molds
« Reply #23 on: July 21, 2022, 08:23:08 AM »
I'm a good bit embarrassed by the poor judgement and careless behavior I demonstrated yesterday, but eating a slice of humble pie is good for you if a lesson is learned as a result. The lesson here is if it's too hot to wear proper attire and all your safety equipment then it's too hot to cast. I own a welding apron, gloves, and face shield but I got lax and those items migrated to other work areas. They will now be migrating their way back. Thank you to everyone for setting me straight.

I was wearing safety glasses yesterday, I just forgot to mention it as they're prescription and always a part of me. Even when I used to wear contacts I was fanatical about always wearing safety glasses. I watched so much New Yankee Workshop as a child that Norm Abram is a surrogate parent to me, wearing safety glasses is programmed into me and I don't believe I am capable of turning a machine on without wearing them.   

smylee, no I was not wearing gloves, I was alternating the t-shirt between my head and using it to open the spout on my pot. I need to reinvest in a pair before casting again. I say reinvest because I owned a pair, was helping a friend move sandstone slabs, forgot why I owned them, and just gave him the gloves. No take backs is a fundamental rule of mine.

wattlebuster, I will get you those measurements. When cutting off the sprue, do you want to cut it off flush or leave it proud a skosh?

Austin, only if you're a subscriber.

Dave, thank you for the good advice, in particular regarding the apron. I never quite connected the dots on why they're important but your explanation is very sensible. The .750 mold only has 4 cavities and the gates are all on the same side.

In regards to mold temperature, I believe I understand too cold. That's when the mold cools the lead prematurely as it enters the cavity and creates sedimentary layers in the casting? Those go back into the pot. But how can you tell if the mold is too hot? Is that what causes it to become difficult to open after a period of casting from the lead expanding too much in the cavity? How far off am I and how can you tell when the mold is too hot?

Online wattlebuster

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Re: Marty's Arms Molds
« Reply #24 on: July 21, 2022, 11:09:24 AM »
Frozen run I cut mine flush when I use a mold that leaves a sprue  but some dont an get fine accuracy. Just measure the sides an see how close the mold is to the specified dia.  Thanks
Nothing beats the feel of a handmade southern iron mounted flintlock on a cold frosty morning