Sizing 6mm BR Lapua Brass to fit 6mm BR Rem Chamber

[deanm]

Hello!

I just purchased a Rem 40-XBBR KS in 6mm BR Rem., should be receiving it by the end of the week!

I have 6mm BR Lapua brass, and was wondering if I can use this brass in my 6mm BR Rem by sizing the body down and trimming the OAL? If so, what full-length body die would work for this?

Thanks!
Dean

 

[BoydAllen]

A friend tried that and ended up having the rifle rechambered. Essentially you can't get around the difference in diameters near the head by sizing. It may go in, but you will get a tight bolt at lower loads than if your chamber was correct for the case. FYI if you ask Clay Spencer if he has found there to be any accuracy advantage from switching to Lapua brass, I am pretty sure that he will tell you that he has not. You might want to try a careful workup with Remington brass before making any change.

 

[deanm]

Sounds like great advice! Do you know where I can find Remington brass?

 

[rayjay]

One of the posters on my thread mentioned a 45 acp die. PM him. I would at least load up 5 rounds of your Lapua brass and see what happens. What twist did the factory 40X 6BR's come with ? It's definitely going to have a short throat. Of course if it's a 14 twist that's what you want.

 

[rayjay]

My 1983 and 1986 Shooter's Bibles list the 6BR Rem but not the twist.

 

[deanm]

I was told that it is 1:12" twist, 24" barrel. It is new, not sure when it was made.

 

[jds holler]

I've got the same situation my old 40XBR in 22 BR Rem. I just got a small base 308 Win Sizer die off of eBay for ten or twelve bucks. One pass through that and I'm good. Haven't had to hit them again even after multiple shots.

I also obtained a bunch of 7mm BR Rem brass and converted it down to 22 BR. No prob with them, except for the work of forming all the way down to .22.

Any small base die in 243, 308, or even -06 should do whatcha need. jd

 

[rangertim]

45 acp will work and a Small Base 308 Die like jds said will work but I had to use new brass to begin with !

 

[CATMAN]

I have 2 boxes of Rem 6mmBR bullets(40 loaded rounds,100gr.),if interested. Catman

 

[deanm]

It looks like Redding makes Small Base dies in 6mm BR Rem. They have a FL die, a FL S-type die, and a Body Only die, all in Small Base.

Has anyone ever tried one of these? Might be another option!

Thanks!

 

[Ggmac]

If you opt for a small base die get one made for your specific need .
Either the 6br sb Rem die or a carbide 45 acp . The good about the 45 carbide is it requires no lube and can be used on any 308 3006 8 mm Mauser based cartridge

 

[deanm]

I picked up my gun today, turns out Remington chambered it with a 0.266" neck, they stamped it on the barrel, and it is a 1:12" twist, 24" barrel. I am not sure when it was made, there is a date on the test target, the first digit of the year is a 0 and the second digit is cut off, so it must have been build sometime between 2000 - 2009. The test target shows three 5-shot groups, and their average was 0.36" at 100 yards.

I ordered a .45 ACP carbide die that I plan on using on 6mm BR Lapua brass if the body is tight, and will trim the necks for diameter and length. I wasn't expecting the 0.266" neck as I was hoping to avoid turning the necks, but I guess I'll have to get my neck turning tool out! I am thinking that I will have to turn the neck wall thickness to 0.0105" to get loaded round neck diameter of 0.264", for 0.002" clearance...does this seem like the correct approach?

The gun is new, and has the green benchrest stock with flat bottom. I would guess that the trigger is set at around 2lbs.

I picked up some 68gr Bergers, hope they shoot good thru the gun. Should be fun!

 

[swd]

Why not just have a gunsmith run a no turn 6BR Norma reamer in and solve all your problems?

 

[deanm]

I might end up going that route, but first I think that I will try shooting it the way it is and see how that goes.

 

[dkhunt14]

I picked up my gun today, turns out Remington chambered it with a 0.266" neck, they stamped it on the barrel, and it is a 1:12" twist, 24" I am thinking that I will have to turn the neck wall thickness to 0.0105" to get loaded round neck diameter of 0.264", for 0.002" clearance...does this seem like the correct approach?

I would allow for a minimum of .003 clearance. It seems to work better for bullet releases. Wow, I never heard of a tight necked factory gun. Learn something new every day. Matt

 

[JRS]

I picked up my gun today, turns out Remington chambered it with a 0.266" neck, they stamped it on the barrel, and it is a 1:12" twist, 24" barrel. I am not sure when it was made, there is a date on the test target, the first digit of the year is a 0 and the second digit is cut off, so it must have been build sometime between 2000 - 2009. The test target shows three 5-shot groups, and their average was 0.36" at 100 yards.

I ordered a .45 ACP carbide die that I plan on using on 6mm BR Lapua brass if the body is tight, and will trim the necks for diameter and length. I wasn't expecting the 0.266" neck as I was hoping to avoid turning the necks, but I guess I'll have to get my neck turning tool out! I am thinking that I will have to turn the neck wall thickness to 0.0105" to get loaded round neck diameter of 0.264", for 0.002" clearance...does this seem like the correct approach?

The gun is new, and has the green benchrest stock with flat bottom. I would guess that the trigger is set at around 2lbs.

I picked up some 68gr Bergers, hope they shoot good thru the gun. Should be fun!

Is that a special ordered Custom Shop model? I had one, and the barrel was a 14 twist. Are you certain the rifle hasn't been re-barreled? I can't imagine Remington offering a tight neck chamber for rifles designed to shoot factory loaded ammo. That's a major liability.

 

[deanm]

It says "Remington Custom Shop, Ilion, NY" stamped on the top of the barrel. I can take some pictures of it and try to post them for those of you who are interested. The gun came in a hard black plastic case with Remington stickers on it, showing the model and serial number.

I don't know if it was a special order gun or not, I would guess it was. As I mentioned above, it is a new gun that is probably 10 years old. I could try contacting Remington and see if they have any more information on how the gun was ordered.

 

[dkhunt14]

Is that a special ordered Custom Shop model? I had one, and the barrel was a 14 twist. Are you certain the rifle hasn't been re-barreled? I can't imagine Remington offering a tight neck chamber for rifles designed to shoot factory loaded ammo. That's a major liability.

Back at the time they were built, I don't think Remington offered factory ammo. I think just brass. Matt

 

[deanm]

I contacted Remington, they said that the gun was built in Sept. 2008, but the records did not say anything other than 6mm BR Rem for the caliber. All the other information in their records as far as barrel length, twist, Kevlar stock, etc. that she said was correct.

 

[deanm]