Just got a Remington 700 in .338 lapua

[jp8775]

I wonder why other manufacturers to not anneal like lapua dose I guess Cost? It looks like Nosler does it also.

I have 190+ 7mm benchrest cases for sale. Most never fired and rest just once. They were made from remigton BR cases. I have the dies and all but no gun any more. (XP 100) from when I was in Mettalic silouette.

[OldmanFCSA]

I have a Witchita 7mm-08 IHMSA handgun in long term storage for my children, someday.

All manufacturers anneal brass, they have too several times in order to form the brass without work-hardening to point of failure during forming process. The casehead is not annealed as in that region the additional hardening is desireable for the formation of features required for operation of firearm. The residue of annealing is sometimes tumbled off, or washed off in a slightly acidic bath, on commercial cases. Military cases are not rewashed as cases are 1 time use as designed.

Annealing is easy to do, but takes time to do properly. But it is worth it in brass life and accuracy gains.

[jp8775]

I have a Witchita 7mm-08 IHMSA handgun in long term storage for my children, someday.

All manufacturers anneal brass, they have too several times in order to form the brass without work-hardening to point of failure during forming process. The casehead is not annealed as in that region the additional hardening is desireable for the formation of features required for operation of firearm. The residue of annealing is sometimes tumbled off, or washed off in a slightly acidic bath, on commercial cases. Military cases are not rewashed as cases are 1 time use as designed.

Annealing is easy to do, but takes time to do properly. But it is worth it in brass life and accuracy gains.

My silhouette rifle was a 7mm-08 Remington BDL. I still have two of them, great cartridge. My son and I son have bagged a lot of deer with that rifle.

[jp8775]

I have a Witchita 7mm-08 IHMSA handgun in long term storage for my children, someday.

All manufacturers anneal brass, they have too several times in order to form the brass without work-hardening to point of failure during forming process. The casehead is not annealed as in that region the additional hardening is desireable for the formation of features required for operation of firearm. The residue of annealing is sometimes tumbled off, or washed off in a slightly acidic bath, on commercial cases. Military cases are not rewashed as cases are 1 time use as designed.

Annealing is easy to do, but takes time to do properly. But it is worth it in brass life and accuracy gains.

My silhouette rifle was a 7mm-08 Remington BDL. I still have two of them, great cartridge. My son and I son have bagged a lot of deer with that rifle.

[RAGGED]

I wonder why other manufacturers to not anneal like lapua dose I guess Cost? It looks like Nosler does it also.

They all do, just some use different ways of doing it and some polish after, some use flames, some use induction, but safe to say all mfg's anneal to some extent, all rifle cases have varying degrees of hardness, the neck is softer while the walls will be medium soft and the head is normally full on hard.



Now I don't agree with John, I think there is a place for annealing HOWEVER the VAST majority of people will likely never have a rifle accurate enough to really know, and if they do they likely won't be a skilled enough reloader to notice. I would never bank on annealing as something that’s going to tightin up groups much. It really helps when you are a match shooter and you run the same perfectly prepped batch of cases match after match, that repeated use will eventually lead to work hardened necks and then and only then will you see a noticeable loss of accuracy. This is only for the really tweakers, guys sorting brass to half a grain, guys that play with every Redding bushing till they find just the right one. If your rifle isn’t shooting thru the same hole 95% of the time at 100 yards you will likely never see any gain.


Now annealing will almost universally keep cases in service longer, provided it’s done right. You can over heat the neck, if you overheat the brass will go dead soft and will never hold proper tension again, you need tension for accuracy, if its visibly glowing you have gone way to far, some say they hit them with a torch till they glow and they simply don’t know what they are doing or what they are talking about. The target temp for the annealed state of brass with produced the faintest glow and will only be visible in the dark, if you are seeing bright anything you have gone too far, that brass is now junk.



As for posting my machine, I’d rather not, I have hundreds of hours into its design, it’s got features no other has. It’s by far the easiest to adjust and has a few other features not found on anything. While I have no ambition to ever make or sell them I also don’t want others taking my hard earned ideas and making a buck off it.

[bulletproof]

I wonder why other manufacturers to not anneal like lapua dose I guess Cost? It looks like Nosler does it also.

Now that you have a name brand IR thermometer on order you'll be able to check the annealing temperature quite accurately.

http://www.6mmbr.com/annealing.html

[jp8775]

400 yards today, some right in the 4”ring, some 10” out. H870 real old (14 years), I have a 8LB Keg of 4831sc. Might be time to switch. Wind was bitch 18-32 gust.

[jp8775]

Going to try to get out this week to frpc and see if I can do little better @400.

[jp8775]

Got the gun back from DPMS, the whole lower back of the cartridge is gone. The case is still in the chamber. They just said it was a catastrophic failure. 1/4 of the case (head) is gone. The case (neck and barrel) is still in the chamber. I will try to get a picture of it, but just may not be able to. If someone who can do this I will meet with them. DPMS made this like new.

[Holland&Holland]

Got the gun back from DPMS, the whole lower back of the cartridge is gone. The case is still in the chamber. They just said it was a catastrophic failure. 1/4 of the case (head) is gone. The case (neck and barrel) is still in the chamber. I will try to get a picture of it, but just may not be able to. If someone who can do this I will meet with them. DPMS made this like new.

So any theory on the loss of velocity on previous shots? I thought your chrono readings where showing the previous 2 shots being odd?

[jp8775]

No, I have no idea what was happening. I do know that I am real careful especially with the charging. I always look at each case. After it is charged. I test every 5 or so by weighing the powder on an electronic scale. It looks like and I will try to get a picture up that the case base blew off or rather part if it.

[jp8775]

Here is the case still in the chamber.

[jp8775]

Here is what they did to the barrel

[jp8775]

Here is the gun back together.

[OldmanFCSA]

Did you by chance have a failed case on previous shot that left part of casing in chamber.
Next round would have had extreme pressure because of partial chamber/barrel blockage.
I've heard of this happening once before, did you have to use forward assist to chamber last round?

Either way, it sucks! Just glad you are not wearing part of that rifle in your face and hands.

When a 50BMG comes apart - EVERYONE knows about it!

Possibly you had a powder charge bridge in charging tube, not dropping full charge on previous round, then dropping new charge and whatever remained of bridged powder into next casing. I've had this happeen to me several times, which is why I hold loading tray with charged cases under bright light to enable visual comparison of powder height in casing before seating bullets.

Just trying to think WHY ???