Modified 240 MK

[rumlover]

Thanks Alleycat, that will give me something to tinker with this winter.

[HotGuns]

Here ya go...
a 275 grainer for your suppressed needs...



Looks just like the one with the 220 Sierra Match Boatail, only this one is lead.
Feeds good too...

[interceptor]

WTH? More info!

[HUNTER2]

Does that thing actually stabilize? I like it! Just wondering - why so heavy? Have you tried to see if it will mushroom? What mix are you pouring?

[HotGuns]

Its 275 because thats what the mold that I made happens to throw them out at.

I am in the process of Moly Coating them now.

I made the mold purposely long. If they aren't consistently stable, I will shorten them until they are by cutting some off the top of the mold.

Currently, the alloy is wheel weights.Not know if they will expand, haven't shot anything with them yet. The two that I shot into the dirt went so deep into the backstop that I couldn't recover them.

[cav_scout_tj]

I like. I was thinking some lube grooves. My math says you should be able to get to 280 grains with 1/8 twist barrels.

Playing at the "online bullet design" at http://www.mountainmolds.com/, I got this 280 grain 30 cal mold:




Also, I was thinking, "How do you make lead heavier?" [Heavier material means shorter bullets] Tungsten of course. Its like 70% heavier than lead. The melting point is also north of 3000 degrees. But you can get tungsten powder, used in golf clubs and such. SO I ask you guys who know more about lead casting than I do, could you add tungsten powder to molten lead? would it increase the weight/density? Mix some of this:

[HotGuns]

Its already been done.
There is an alloy called Tungstalloy, which we use for fabricating balance weights used on steam turbines.

It is heavy and it is tough, tungsten is also an alloy ingredient that is used in steel, making it very tough and gives it the ability to hold its shape when its red hot.

You could use this for a bullet, but it would have to be machined and I'm pretty sure that it would be armor piercing due to the weight and toughness.

No way would it expand on a living creature its just to tough.

[Rikky Lee]

Increasing the Tin level in the lead increases its hardness. A quick Google across the muzzle loading sites will give you a good steer. My thoughts are a medium hard projectile with moly coating will start the required tumbling (ie not expand which is a supersonic concept) after an inch or so to tear a 70 cal hole in the target.

[HotGuns]

I don't think he is worried so much about the hardness of it as he is the weight.

A bullet the same length as say, the 240, that weighs 50% more that would weight 360 grains.

A 360 grain bullet the same size as a 240 would be quite the combination don't you think? That would be over 800 FPs of energy.

[cav_scout_tj]

Originally Posted by HotGuns

Its already been done.
There is an alloy called Tungstalloy, which we use for fabricating balance weights used on steam turbines.

It is heavy and it is tough, tungsten is also an alloy ingredient that is used in steel, making it very tough and gives it the ability to hold its shape when its red hot.

You could use this for a bullet, but it would have to be machined and I'm pretty sure that it would be armor piercing due to the weight and toughness.

No way would it expand on a living creature its just to tough.

Its not a alloy, its more of a suspension. The lead melts at 600 deg, the tungsten not till 3000 deg, so the tungsten grains would still be in the lead. Its like the fillers you can add to epoxy resins. I guess that would be part of the problem, the fillers thicken up epoxy, so its more spreadable like peanut butter. A lead/tungsten powder mix might not flow well into molds. Have to mess with the composition, to see how much tungsten powder could be added and still have acceptable mold flow. Hell the tungsten may just sink to the bottom of the pot of molten lead, have to find out. If you could make a bullet, I dont think it would be very hard and may break up on impact. The thought was to increase the weight of bullets out of existing molds.

I dont think this concoction would be any good weight fabrication. Regular old tungsten would be much better.

My google on "Tungstalloy" came up empty, so I can't evaluate that.