6mm br norma bushing sizes?

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crossg

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Looking for a little help from the experts. I'm having my Sako A2 rebarrelled to a 6mm br, with a Maclennan 1 in 12 twist. The reamer is .269. I plan to shoot 65 to 87 gr bullets. I'm in the process of ordering dies and neck sizer with bushings, what size bushings do I need in order to get the proper neck tension and should I order more than one bushing. One other question in regards to dies, I'm thinking along the lines of the Redding competition but not the micrometer full and neck size. I beleive they sell a set with the full length and neck size bushing dies with the micrometer bullet seater (132.00 as compared to 200.00 US. for the full micrometer set). Do you think this would be the way to go as this will not be a full blown bench gun, more for vermin and paper punching. Thanks for any input. Bye the way I live in Calgry Alberts Canada. pretty hard to find dies and bushings up hear, any more ideas. Bye for now.
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Gary.
 
First off,

I take it you will be using Lapua brass?

Secondly with a .269 chamber you will have to neck turn your brass so a loaded round is measuring about .267-.2675 to give you clearance for easy chambering. You may not have to but better to be safe than sorry.

My 6BR is on a .272 neck. My loaded rounds measure .268. If and when I have to rechamber I will probably go with a .270 neck since there is enough clearance. That can change depending on the brass dimensions.

I regards to bushings I would get a few. I would get .264, .265, .266. In regards to the dies go with the Redding set part #38317. It has a neck sizer that takes the bushings minus the micrometer adjustable top. It is not needed anyway. You adjust it just once and leave it there. It has the shoulder bump die and the seater die with the adjustable micrometer top.

I think that should have it.

Gary, I also sent a PM.


Calvin
 
Thanks Calvin, just a little confusing with the bushings, and yes the dies you suggested are the ones I was looking at. Bye the way I am using Lapua brass and went with the .269 neck as that is what the gunsmith had on hand. I knew about the neck sizing and thought it would help accuracy with just a little clean up on the neck and once done should be good for the life of the brass. Gary.
 
Hey Calvin, my buddy has the neck turner and I beleive it is the K&M. Since your being so helpful, I was talking to my gunsmith and we were talking about full length resizing and he mentioned that it not a good idea to run the expander ball through the neck (hard on brass) when resizing, not sure what he is talking about as I thought the expander actually held your decapping pin. Also with the redding dies, do they come with the proper size decapping pin, thanks again Gary.
 
The set comes with 2

sizing buttons or expander balls. Yes it holds the decapping pin in place so you will have to use one or the other. One that expands the neck and one that does not. I switched to the smaller so it does not touch the neck walls at all. The drawback is if the neck has a ding it does not take it out. You rely on that being done when the bullet is seated.

If I were you I would get a tapered sizing button that is used to open the neck from .224 to 243 when you order your dies. The tapered button is very smooth on the sides and it would remove the dings out of the neck when sizing for the first time. The larger sizing button that comes with the set is rough and I found it was scratching the necks on the inside.

Finally, enjoy the process. I have just done one project myself and loved every minute of it.


Calvin
 
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I had a hard time to find dies in calgary also I had to order from sinclairs in the states if you order dies get the bushing neck die and body die I think you can get in a set for the seater die get the wilson hand seater with micro adjust it is a much better seater die than the one you will use in a press and you will have hardly no runout .
 
coyote said:
I had a hard time to find dies in calgary also I had to order from sinclairs in the states if you order dies get the bushing neck die and body die I think you can get in a set for the seater die get the wilson hand seater with micro adjust it is a much better seater die than the one you will use in a press and you will have hardly no runout .
Click to expand...

Not sure if it is a much better seater than the Redding but it is just as good. The advantages I have heard about the Redding Micro adjust seater are that the entire case is supported by the moving internal sleeve B4 the bullet touches the neck thus total support. Disadvantage need a press with you. The Wilson you can basically seat bullets buy hand. It is just preference. I beleive a lot of BR shooters have a press with them anyway as most use dies custom cut to there brass specs which bump the shoulder back and neck size by bushing. Yes it can be done by Wilson dies as well. Again just preference.


JMO
 
We carry some Wilson products and routinely bring in Redding.

I would look at starting with steel bushings until you find one that works best. Ti coated ones are considerably more expensive.

You need to know your overall diameter of the loaded round and compare it to your chamber. Some guys round only a few tenths clearance while the majority run 2-3 thou. clearance.

A bushing approximately .003 undersize of your loaded run on a tight neck is a good starting point. As the brass ages and work hardens you may need to go .004 undersize.

If your running a .269 neck, and your loaded brass at the pressure ring measures .267 dia. I would go with (3) bushings .264 +/- .001.

Wilson dies and an arbor press are a good way to go as well. Less money and qaulity reloadings. Harrell makes an inexpensive bump die as well. We still have some arbor presses and some 6mm BR dies in stock. If you like send me a pm and I'll get some pricing to you.

Glad to see another BR person....:)
 
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