Let’s say your reamer spec calls for .460 at the shoulder.
How much below that should brass be in ideal situation?
How much below that should brass be in ideal situation?
How much clearance needed at body/shoulder junction.
- Thread starter Dthomas3523
- Start date
I like my dies to size it .003-.004 there bouts for peace of mind but one of mine, can’t remember off the top of my head which rifle, sizes it .002 only but I can’t tell in using the thing.
Edit: So I guess now that I think about it I have no idea what’s proper.
Edit: So I guess now that I think about it I have no idea what’s proper.
I don’t think there really is an ideal. With the shoulder just above that junction, it’s one of the most centered portions of the case at the point of firing. I’ve never experienced any case failures there either. .002-.003 is totally sufficient imo.
So, let’s say you have a .460 there.
(Deleting pics as it’s apparently distracting people)
One brand of brass is .460-.4605
Another brand is .457.
With there be issues with the brass that is already at .460 in a chamber cut for .460?
(Deleting pics as it’s apparently distracting people)
One brand of brass is .460-.4605
Another brand is .457.
With there be issues with the brass that is already at .460 in a chamber cut for .460?
Last edited:
Talking about the measurement in question for now.
If it’s a .460 chamber at shoulder, and I’m at or over .460 starting......doesn’t the brass need room to expand? Or carbon or dirt?
No, what I am referencing is an optical comparator. I was illustrating that you are not measuring at the point referenced on the print but approx .200 further up. This will make your numbers bigger in diameter.
It’s the same with caliper. I’ve measure 20x.
So, either join in the conversation on whether or not there is an issue with a .460 chamber with .460 brass, or fuck off.
Hornady is .457 on the caliper AND mic.
Fire one and check the growth. Then run it in your die and remeasure.
There was almost the same type post on accurate shooter, one knowledgeable guy gave some solid info, I want to say 1.5-2 thou growth.
The issue I’m having is pressure and sticky brass/bolt.
Virgin alpha brass in a very light load. It’s coming out of the chamber at almost the same .4605 as it’s going in. Die is hardly sizing it down
Hornady not exhibiting same issue. Die is sizing it under .460.
I was attempting to get opinions on if brass being the size of the chamber already was a problem without introducing the bias of what issue I’m having.
And if there is a possible issue, then I need to move onto why factory brass made for what is at the moment universal reamer spec is so close to the chamber size.
New brass is usually so undersized, so I have never seen this. How does the die do sizing at the .2 line? Maybe a new die in order, but wont solve first firing issues.
I have way more experience with brass growing so much in dia and length that it was almost impossible to not gas the shoulders w/o a Hot charge.
The .2 line seems to be sizing fine, was the first thing I checked.
Had this issue with this brand of brass (2nd firing at that time) at a match and had to stop shooting. Barrel was very dirty and attributed it to carbon ring (still need to go back and test now that barrel is clean).
This is a new rifle with brand new barrel. It’a happening again and now with virgin brass if the same brand. So, carbon ring being the issue is out now.
Probably gonna get another die and see what happens.
Also, from now on, I will never chamber another barrel that lapua doesn’t offer brass for.
Backed the charge way down (should run about 2775fps) and going to see how that runs later today.
A few guys I know had to do that with their dasher brass. Back the charge down to 2800 or so to get heavy bolt to go away.
A few guys I know had to do that with their dasher brass. Back the charge down to 2800 or so to get heavy bolt to go away.
Fucking perfect, just had a friend who picked up a GT, his problems are usually mine too. If you do not mind Whidden, i'd send 3 fired cases to them and have them make a die, think they'd be the quickest.
A guy can back off, I myself have guns built with expectations in mind, I am not shooting a 6x47 at Dasher speeds.
I was planning on possibly running slow for recoil/trace/shooting purposes. But IMO, out of principle, I shouldn’t *have* to.
But at this point, I’ll just run 6br and have lapua brass I don’t need to do anything extra to.
Curiosity has me wondering if the alpha was annealed if it would size down like the Hornandy
One last thing, I shot a couple barrels of 6 SLR, form brass in a die, my first firing my brass was growing .0005" in length, so tight. I never had issues there.
I see neck dia in chamber .273, so what does a loaded rd measure on the necks?
I see neck dia in chamber .273, so what does a loaded rd measure on the necks?
Already tried it. With virgin and fired alpha.
Annealing allowed it to size under .460, but not quite as much as hornady.
But I’m tracking with you. I’ve suspected brass hardness as being an issue.
Not turned, about .269 - .270
Turned I‘m setting it at .267 and .268
Had issues with all diameters listed so far.
That definitely would be a problem imo. Weird that the die pushes the hornady brass down, but not the alpha. What is the sized shoulder diameter of the hornady?
You checked that box.
Wasn’t there an issue like this with the original 6BR
Then Norma and lapua started making brass with beefy case body and shoulder and POOF!
Now 6BR Norma is the standard chamber.
6 Alpha Gay Tiger !
Good luck! I have wanted to give Alpha a shot since they came out, never once is brass I want in stock. XC, 6 creed, Dasher, one more, I don't even go to their page anymore.
In reality the brass be undersized at that point for many reasons.
Reamers wear being one of them.
I neck size a lot but my brass still has some clearance on the sides even when it’s getting tight because the shoulder is getting a bit long.
I think The brass is the problem.
Is there a large case volume difference?
Maybe they messed up and got the walls thickness wrong.
Reamers wear being one of them.
I neck size a lot but my brass still has some clearance on the sides even when it’s getting tight because the shoulder is getting a bit long.
I think The brass is the problem.
Is there a large case volume difference?
Maybe they messed up and got the walls thickness wrong.
I’m about done with them.
Dasher:
lapua no prob
Alpha pressure
6gt so far:
Hornady no prob
Alpha pressure
Could be totally coincidence. But it’s starting to become a pattern
I’ve had good results with hornady so far.
I had Hornady to hold me over until alpha was available. Well it became available sooner than I expected. So I haven’t been messing with hornady a lot to see how it does after a firing or three.
Two matches with hornady brass so far. Won one of them and the other it ran fine.
Match with alpha brass I had to stop shooting. ?
Completely unrelated other than it’s alpha but my 22 creed cases seem to be hard as fuck. My giraud 22 cutter was having a hell of a time for initial prep so I stopped at 4 cases and hand chamfer and deburred the rest. I’m shooting low loads to get through these 100 and then I’ll see how an anneal and sizing effect that. Cutter works perfect on my 223 lapua, these 22 creed felt like it was cutting steel cases.
Some of these alpha cases I had to really take it slow in my giraud. Really rough and lots of chatter.
One even got hung up in there. Looked like shark’s teeth when I got it out.
