30BR help

[tammons]

I have a barrel coming, and also bought out a
guy with 30BR sizers etc.

I got LE wilson shell holders fired and unfired,
le wilson neck resizer, le wilson
bullet seater, Redding body die, K+M expandron,
and 50 rounds of resized brass with the donut turned off
and 50 rounds of stock 6mmBR Lapua brass.

The rest of my stuff is rcbs. I have a rcbs
trimpro, but no neck turners. I can go the
rcbs autofeed attachment or I could get a
hand held neck turner.

I formed one case and got the donut and it
seems to me that turning the donut off as
suggested will make the case too thin in that
spot.

As I understand it you are supposed to
open up the case, turn off the donut,
neck size it, fire the case,
then do the final trim and turn.

STD robinette chamber

Can somebody experienced with 30BR case sizing
walk me through the entire reforming sequence ??


Thanks

 

[Shelley]

OK, I'll try although I use some unconventional methods for my stuff such as turning the necks in a 16"X40" 4000 lb. engine lathe.

Firstly, I'd like to comment on the donut. The outside donut is formed when you neck up and a short part of the shoulder brass, which is thicker than the neck brass. The shoulder brass then becomes part of the neck. It should be turned off or it'll just become a donut on the onside of the neck.,I'm not too sure whether that causes any grief or not.) With the method I use the donut ends up inside from the get go and I do absolutely nothing about it other than ignoring it. And, no, I won't go into the method I use because it has the potential to be fatal if mis used.

1. Expand the neck to 30 caliber. I use Imperial Die Wax on the expander mandrel.

2. It may be good to trim the brass a bit here if the brass neck is longer than the neck in your chamber. Since I no longer use this method I can't remember.

3. Neck turn with the cutter just lightly kissing the shoulder. I use two passes when using the hand held turner because that donut is pretty hard to get through otherwise.

4. Do any final trim and chamfering and you're good to go.

Shelley

 

[Aussie_bob]

Mate don`t make it complicated.
When sizing the case use the expander and good wax as lubricant start the expander so it bells out the mouth of the case then push it through in one motion you won`t loose any cases in this way. I went at it a bit hard when i first started and stuffed a couple of cases just keep the lube up to them i have done another 100 cases since the first fifty and havent lost anymore
Then Turn the donut which involves setting your cutter so that it just kisses the existing neck turn the donut off just slightly into the shoulder I have a Sinclair neck trimmer and the angle on the cutter is perfect to just trim the shoulder. If you have a standard Randy reamer design should be a .330" neck in the chamber so set the cutter so there is just .010" between cutter and Mandrel or .0095" if you can set it i use a feeler guage this will skim off the neck right up to the shoulder again and leave you with a neck of .328-.327 loaded.

 

[RGRobinett]

With your equipment, simply follow the advice provided,in the 30BR section) by Joe Entrekin - since we began messing with these in 1998, many tens of THOUSANDS of rounds have been fired in both practice and registered competition - I have yet to hear of a single neck failure. Necking up simply pushes the relatively thick neck/shoulder junction outward,there is little or NO flow here)creating the often observable outside "donut". Neck turning removes the LUMP and uniforms the neck wall thickness - section a few cases.
My original Morrison 1:18" twist barrel was "worn out" using only 30 cases - about 6400 rounds before I had to learn how to shoot again! My preference is for a loaded round [neck]diameter between .3280" and .3285", measured across the bullet base or, "pressure-ring". Back to Joe's advice: if you follow it, and using any of the custom BR quality bullets, your rig doesn't SHOOT, something is wrong with either the rifle or scope. R.G.

 

[tammons]

Thanks for the good advise.

 

[rayjay]

RG,
You have a PM. I need to order some bullets and your listed phone number is no good.

Thanks
Ray

 

[RGRobinett]

"RG,
You have a PM. I need to order some bullets and your listed phone number is no good.

Thanks
Ray "

Ray, I have been unable to reply to PMs - please call me: 515-438-4010. R.G.