ETA II - Have the Wheeler vids on YouTube been taken down? I can't seem to find any of them any longer.
You can find their videos via their website
Wheeler Videos
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ETA II - Have the Wheeler vids on YouTube been taken down? I can't seem to find any of them any longer.
You can find their videos via their website
Wheeler Videos
Do you set with the go or no-go?I set the head space with go no go gauges. I took a 1x fired case and sized it bumping the shoulder back until the bolt would drop closed by itself. The 3x is sized. I edited that post. I also took the sized 3x case and sharpied the base and web. There is a nice clean ring around the case at the .200 mark.
Do you set with the go or no-go?
If you set the headspace using the no-go guage will the brass chamber? No-go is still acceptable just on the larger side.
What is your actual headspace measurement and how are you measuring?
What I'm getting at is that you can set headspace smaller than your die can size. You might be on that cusp.
Necro thread alert! I've got .532 at .200 up from the base on my sized brass. The brass has 3 firings. The barrel is a Mcgowen remage. I'm going to pull the barrel and open up the chamber. How much does it take? .001 or .002 or more?
Just spitballing here. if he already has the die bottomed out and it's only bumping .002 I'm inclined to think his fired brass is on the small side and he could do with more headspace which would in turn alleviate pressure on the sides. Since cases are tapered like a cone inside a cone.It’s likely not the headspace. As his previously fired and sized brass was working. So his die was able to shorten the headspace previously.
This is probably the case.Your problem is that your sizing die is not sufficiently small enough in diameter to squeeze down your brass to fit in the chamber. You can't fix this by pulling the barrel and "opening up the chamber" by backing the barrel out a bit to increase headspace. That's going to make the chamber longer but it's still going to be too small in diameter.
The only way to fix is to get a different sizing die that has a smaller internal diameter, or by recutting the chamber with a reamer that has a larger diameter.
Recutting the chamber is what I meant by opening up the chamber. Not adjusting headspace.Your problem is that your sizing die is not sufficiently small enough in diameter to squeeze down your brass to fit in the chamber. You can't fix this by pulling the barrel and "opening up the chamber" by backing the barrel out a bit to increase headspace. That's going to make the chamber longer but it's still going to be too small in diameter.
The only way to fix is to get a different sizing die that has a smaller internal diameter, or by recutting the chamber with a reamer that has a larger diameter.
No, it has not been annealed.This is probably the case.
Are you annealing this 300PRC brass?
Probably not the issue but it is a variable.
Well with magnums your definitely getting to the point where brass(especially ADG) will be hard enough to start requiring die adjustments to maintain headspace and resistance issues.No, it has not been annealed.
It's even easier than that. Simply hand tighten the barrel down on the no-go guage. Then check if sized brass fits. If it does then you know you can size it to fit.But easy to check.
Take measurements of the case body and then keep screwing die down and see if you can get the body sized any more.
If so, set the headspace .002 or so longer than that sized case. If it chambers correctly after, problem solved. Unless it ends up being too short for virgin brass.
If not, you can either:
- shave some off bottom of die (may or may not work)
- enlarge the chamber (also might not be the correct move if it’s the die that’s issue)
- get a die that sizes smaller or have custom die made