Bore out rcbs neck die

[Merdoc]

Looking for someone to bore out a 300 wsm neck sizing die, needs to have a 0.485 hole bored where the neck area is now, ie cut ,honed , drill,reamed etc, needs to be as factory finish as possible, polished smooth. Any info greatly appreciated

 

[Just Say Moe]

Links - I guess bushing dies are not an option?

Consider doing it yourself?

Check this thread

 

[AlNyhus]

What's the diameter of the neck opening now?

 

[boltfluter]

Looking for someone to bore out a 300 wsm neck sizing die, needs to have a 0.485 hole bored where the neck area is now, ie cut ,honed , drill,reamed etc, needs to be as factory finish as possible, polished smooth. Any info greatly appreciated

Will the .485 section be for neck sizing or putting a bushing in? We need more info.

 

[Merdoc]

Will the .485 section be for neck sizing or putting a bushing in? We need more info.

so what i would like to have is a check die for a loaded round, i have a custom set of dies for a 450/348 ackley alaskan , when you bump the shoulder or size new brass it creates a very slight doghnut inside at neck/shoulder junction , when you seat the bullet it can push that doghnut outward and sometimes can cause the round to slightly be snug into the chamber, the 300wsm neck die i had laying around and would work perfectly if it had a 0.485 hole exactly, i would run the round up to the neck junction and it would “ironout any deviations

 

[Merdoc]

Links - I guess bushing dies are not an option?

Consider doing it yourself?

Check this thread

A bushing die would be perfect but this is a weird wildcat and i cant find a die or a bushing that works , if i had a 44 mag length carbide sizer that measures 0.485 it would work , have an email to lee as an option but haven’t heard back yet

 

[AlNyhus]

I wouldn't try to do anything on the outside with a bullet seated. Why not just remove the donut on the inside before seating? -Al

 

[William Vogel]

You probably already know this but what you’re explaining with the donut is that after seating the bullet, the donut stretches the neck/shoulder outwards. By sizing again, you’ll crimp the bullet. Maybe if you used a mandrel or index pin instead of the bullet to move the donut and then seat the bullet.

 

[Merdoc]

I wouldn't try to do anything on the outside with a bullet seated. Why not just remove the donut on the inside before seating? -Al

What are the options? Ream the inside of the neck? If i run a mandrel in it it will still push the doghnut outward, i thought about turning the necks but its very labor intensive and not sure i want to thin the neck on a big boomer , not sure why the reamer they used on this thing is so tight , the rounds do go in the gun and there is no pressure but i would like these rounds to simply drop in the chamber,

 

[AlNyhus]

Having done this more than a few times, I believe the best way is to use a chucking reamer on the inside of the neck to remove the donut. You need to get an accurate measurement of the diameter of the inside of the necks after sizing...pin gauges work great for this. Once you have this, it's a simple matter to get an inexpensive chucking reamer and remove the donut by hand.

Happy to walk you through it if you want to go that way.

Good shootin' -Al

 

[Merdoc]

Having done this more than a few times, I believe the best way is to use a chucking reamer on the inside of the neck to remove the donut. You need to get an accurate measurement of the diameter of the inside of the necks after sizing...pin gauges work great for this. Once you have this, it's a simple matter to get an inexpensive chucking reamer and remove the donut by hand.

Happy to walk you through it if you want to go that way.

Good shootin' -Al

Will investigate that chucking reamer , been in this rabbit hole game a long time but chucking reamer is new to me , thanks,

 

[yukonal]

If i run a mandrel in it it will still push the doghnut outward.
i thought about turning the necks but its very labor intensive and not sure i want to thin the neck on a big boomer .

Run the mandrel in, push the doughnut outward, and just clean up the bottom of the neck at the neck/shoulder junction.

I've done this with several of my cartridges. You don't have to turn the whole neck. You can just set the turner to touch it up wherever you want.

 

[DaveTooley]

Having done this more than a few times, I believe the best way is to use a chucking reamer on the inside of the neck to remove the donut. You need to get an accurate measurement of the diameter of the inside of the necks after sizing...pin gauges work great for this. Once you have this, it's a simple matter to get an inexpensive chucking reamer and remove the donut by hand.

Happy to walk you through it if you want to go that way.

Good shootin' -Al

This by far the simplest and most cost effective way to do this. I've been doing it for decades on various calibers.

 

[AlNyhus]

Will investigate that chucking reamer , been in this rabbit hole game a long time but chucking reamer is new to me , thanks,

Do you by chance have a Wilson case length trimmer?

 

[Merdoc]

Do you by chance have a Wilson case length trimmer?

Nope , rcbs trimmer

 

[AlNyhus]

Nope , rcbs trimmer

Ok. Wilson can supply specific size reamers that work in their case trimmer. No matter...just would have made an easy job easier. -Al

 

[Merdoc]

This is what it looks like, hard to see and this one has been in the gun, goes in but its about a half to one thou big

 

[SKWERLZ]

This is what it looks like, hard to see and this one has been in the gun, goes in but its about a half to one thou big

That looks like the line where the bullet stops expanding the neck, usually a donut is at the neck/shoulder junction.
You can enlarge the neck bore on the die to lessen the effect.
Many cheaper dies over work the neck and resize it smaller than needed