Flat nosing a cast bullet.

surveyor

Old Mossy Horns
I have a Lyman 311410 mold which casts a 136gr bullet. Thinking of a way that I can consistently cut the tip off to leave a roughly 5/32" meplat.

Reason being bullet seating depth, versus the cannulure versus just wanting to see how a small flat nose would perform on critters.

Anyone think of a way that I can consistently cut a couple scores to use and check performance before I modify a mold or commission a specialty mold, which can take a while in the current situation?
 

Mr.Gadget

Old Mossy Horns
There are guys that make bullet trimmers or cutters.
Most the time it is for FMJ/match.
I have a few cutters that were custom made for cutting casting sprue off round balls also had some others made for making a hollow point bullet. Not sure I have them around, ended up getting a HP mold.
 

surveyor

Old Mossy Horns
Ok, I went ahead and did it.

I made a jig to cut the meplats.

Made it out of brass, because that's what I had.
 

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surveyor

Old Mossy Horns
Insert bullet, tighten the patented pressure screw and it's ready.
 

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surveyor

Old Mossy Horns
Takes the Lyman bullet from 136gr ish down to 132 ish and it still feeds in a M1 Carbine.
 

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surveyor

Old Mossy Horns
Meplat is about 0.17".

A little bigger than I wanted, but it only took an hour, and I have more brass if I really wanted to get down to 0.15" or less.

I guess the bigger flat will allow me to go nuts and put a 0.08 hollow point

I doubt if the weight change will alter center of gravity.

Need to load up a dozen and see how they fly.
 
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Eric Revo

Old Mossy Horns
Contributor
Meplat is about 0.17".

A little bigger than I wanted, but it only took an hour, and I have more brass if I really wanted to get down to 0.15" or less.

I guess the bigger flat will allow me to go nuts and put a 0.08 hollow point

I doubt if the weight change will alter center of gravity.

Need to load up a dozen and see how they fly.
Ought to be easy to convert that to make hollowpoints as well
 

surveyor

Old Mossy Horns
Well, reloading info for bullets greater than 120gr in a 30carbine is so woeful, I was beginning to think as many suggested, the bullet (@134gr) was too heavy, even circumcised to length.

Glad that didn't stop me.

Sized to 0.310". 10.5gr H110.

Still got a grain or so to go before I get theoretical pressure issues.

80 yards, offhand.
 

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