Dimensions/specs of a .50bmg boolit....to order an Accurate mold?

[emt1581]

I was going to order NOE but he stopped answering phone/emails and looks to be unable to get blocks in so Accurate it is! Trying to navigate all the screens for what I assume will be one hell of a finely tuned mold. It's asking me about body diameter and then a +/- tolerance....what do I select??

It'll be shot mainly through my 29" Ligamec Raptor. Also have a Watson I haven't decided to sell yet so I suppose a few might be sent through that.

Thanks!

[rockrat]

Many BMG chambers , I believe, are generous in the neck,throat area, unless a match chamber. I usually size to .512"-.513". You could order a 0.511" with hardball alloy, +/- 0.002-.0.000" and adjust diameters with different alloys. What velocities are you wanting to attain?
I use a little copper in my alloy

[emt1581]

Many BMG chambers , I believe, are generous in the neck,throat area, unless a match chamber. I usually size to .512"-.513". You could order a 0.511" with hardball alloy, +/- 0.002-.0.000" and adjust diameters with different alloys. What velocities are you wanting to attain?
I use a little copper in my alloy

Chamber is listed as being US Mil-Spec.

Right now I have harder alloy. However, in the future it'll be mostly range lead unless there's good reason to buy rolls of solder/tin for the price they demand.

So .511, .512, or .513 based on the three you mentioned?

Thanks!

[emt1581]

Chamber is listed as being US Mil-Spec.

Right now I have harder alloy. However, in the future it'll be mostly range lead unless there's good reason to buy rolls of solder/tin for the price they demand.

So .511, .512, or .513 based on the three you mentioned?

Thanks!

Anyone?

Thanks!

[rockrat]

If range scrap, then I would go with .512". I really prefer .513", but the crimp on the seating die catches the .513" and messes up seating depth. Water drop your boolits, or even possibly powder coat the boolits(next years project). What speed are you looking for? Range scrap might work well for 1600fps, but above 2000fps, probably not so much (but powder coating might work, thats to be determined). I had problems above 2100fps with gas cutting and gas check coming off at times.

[emt1581]

I do powder coat 9mm and .223 with good success. But it leaves slight imperfections on the surface that .50bmg might not like as much. Speed isn't so much of a concern as distance. I have 100, 200, and 300yd ranges to practice at. I also do water quench all my bullets just to tighten up the molecular structure. Never tested it to compare it to non-quenched hardness given the same alloy.

Thanks

[emt1581]

Sent an email to Tom at Accurate. We'll see what he comes back with.

[emt1581]

Heard back from Tom...
"I can't advise about design or diameter here, since I have no experience with the bmg."

Thoughts??

Thanks