bore riding section too big

[tommag]

I cast some 311331 and made a dummy round. The nose won't allow chambering in either of my 06's. They mic at .3024.
Looking at grafs website, I find no sizing dies in the .300-301 range.
Where should I look, or do I have to have one custom made?
I have a Lyman 4500. Would this work, sizing them upside down to the driving band?

[Beagle333]

This should fix ya up. You need to contact Buckshot. He makes a die for sizing noses. This shows the sizing die in action. It works really well too. And you can change the bushings for different calibers.

http://castboolits.gunloads.com/showthread.php?225875-Is-your-nose-too-big

[tommag]

Thanks!

[grouch]

Maybe you could try some of those boolits in softer alloy like 20:1. For targets it might be good.
Grouch

[hiram]

I have read somewhere that you can possibly find a die body, either full length or bullet seater of the correct diameter to size the nose of the bullet. Push the bullet out with a wooden dowel or the like,

[geargnasher]

What size are the driving bands casting?

What alloy are you using?

What temperature was the alloy when you cast those?

Frosty, shiny, how do the boolits look?

Gear

[Bullshop]

I just had Buckshot make me a nose die at .301" when I had a similar problem. This die fits my RBCS LAM press bit it has no lube holes.
Just use an appropriate base punch and size the nose only in the die.

[tommag]

They are ww and 2.5% tin. I wasn't getting good fill out at lower temps, so they are frosty. Thermometer showed around 750, but I don't have confidence in it. The driving bands are at .312+, almost .313.
Maybe more tin and less heat might work?

What size are the driving bands casting?

What alloy are you using?

What temperature was the alloy when you cast those?

Frosty, shiny, how do the boolits look?

Gear

[tommag]

I sent a pm to buckshot. The dies that use neck sizing bushings look like a good tool to have, even if I could adjust alloy/temp to make the as cast size fit.

[high standard 40]

+1 on Buckshot's nose sizer dies. I have one of his that uses the Redding or RCBS neck sizer bushings. It works great.

[geargnasher]

Sounds to me like the whole mould is throwing large because of way too much tin.

Cut it back to 1% and I'll bet the size drops at least 1.5 thousandths.

"frost" is a function of mould temperature, not alloy temperature. The more frosty, the smaller the boolits will be. Also, run your alloy down around 100F above the full liquidus point and they will be smaller.

2% + tin and running the pot at 725+ and the mould as cool as possible is a recipe for correcting Lyman's epidemic of undersized moulds in the past few years. You obviously got a mould that doesn't need that.

Gear

[tommag]

Less tin and lower temps. I'll try that when I get back home. I ordered Buckshots sizing die, as well.
If allowed to cure for a couple weeks, (air cooled), then nose sized, would this soften the nose? I'm thinking that might not be all bad, as a hunting boolit.

[Blammer]

This is my guess.

before you go getting a 'nose' sizer, try this.

measure the nose of a cast boolit BEFORE you size or GC it.

what is the nose size?

if it is smaller, you have an issue when you size, you are fattening the nose.

it's easy to do in a lyman 450.

[geargnasher]

Good point, Blammer.

Gear

[44man]

Yep, agree, might be expanding the nose. But frosty boolits are smaller then those cast cooler. I don't know why this persists. Lower temps make LARGER boolits.
Buckshot will fix the problem, I just lapped a Lee die to .301" for my 30-30. I made the mold wrong and have a fat nose.
Adding or subtracting tin will do nothing for size.

[tommag]

Yep, they are bumping up while sizing.
Nose next to driving band:.3026 as cast, .3035 after sizing.
Nose near ogive:.3019 as cast, .3024 after sizing.

[tommag]

Tried 640 degrees, mold hot enough to frost, and 1% tin.Getting closer.
Water dropped, driving band.3113. Nose by ogive .3013. Nose near driving band .3015.
These measurements were taken immediately after cooling in water.

[44man]

They are still going to expand some with age.

[grouch]

I say again - try softer alloy(20:1). If you can chamber and remove the cartridge without sticking the bullet in the throat, it may shoot very well. The benefits of hard alloy are often overstated.
Grouch