It will often peen the case mouth and create the same type of burr that is on the case mouths of new brass, sometimes much worse. It's very prone to it with brass that's been chamfered/deburred because the mouth is "sharp". After a few cycles the case is shorter than trim length from the mouth repeatedly being "sharpened" then beaten down again. Then it's a real PITA to remove it again. Sure, the brass is shinier with it, but it doesn't shoot any better (shoots worse with the burr if it isn't removed).
Reloading for PRS Matches
- Thread starter Max Owner
- Start date
It will often peen the case mouth and create the same type of burr that is on the case mouths of new brass, sometimes much worse. It's very prone to it with brass that's been chamfered/deburred because the mouth is "sharp". After a few cycles the case is shorter than trim length from the mouth repeatedly being "sharpened" then beaten down again. Then it's a real PITA to remove it again. Sure, the brass is shinier with it, but it doesn't shoot any better (shoots worse with the burr if it isn't removed).
redneckchris
CGN Regular
- Location
- komoka ontario
What are most guys using for primers?
Which brands are better or most consistent?
Are most using match primers?
Which brands are better or most consistent?
Are most using match primers?
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
NO,.... size as required for a proper fit and function in your chamber.
FL, neck sizers... these are just tools. Reloaders have to start understanding what the dies do and what they need for proper function.
Also, dies vary in actual size so you may need to mix and match for the best end result.
Jerry
We need a Canadian components manufacturers for projectiles, powders, brass, and primers. If a small country like Finland can produce high quality components, I cannot understand why we in Canada could do the same. I'm tired of paying for the US and Euro exchange.
ton
ton
The problem is that compared to the population percentage of Finland, there are far fewer hunters and sport shooters in Canada. They have mandatory military service and they take it seriously, alot of Canadians don't see the need for our military. Significant cultural differences and we are a small market.
Add in that our government is not supportive of the citizenry being into shooting or owning guns and would slight endeavours to manufacture our own munitions at every turn given the opportunity.
Incidentally IMR powder is made in Canada....for the Americans.
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Unfortunately it wouldn't matter any ways. Even the Canadian companies charge us US import prices on their stuff
I agree with that.
While there are some fine products out there, and example being Matrix bullets, you think "this could be a great alternative to Berger, SMK, etc". Then you go through the checkout process and see the Canadian company has all their pricing in USD.... Ok.. not so good.
They'll say it's required to be profitable. Maybe I agree with that, but at times I don't. Berger has a massive market, Matrix does not.
While there are some fine products out there, and example being Matrix bullets, you think "this could be a great alternative to Berger, SMK, etc". Then you go through the checkout process and see the Canadian company has all their pricing in USD.... Ok.. not so good.
They'll say it's required to be profitable. Maybe I agree with that, but at times I don't. Berger has a massive market, Matrix does not.
Here are some pics of the burr being removed. It's a new case that has been trimmed in the Giraud after being sized and run over a mandrel, and has had the K&M VLD chamfering tool remove the remaining burr form the inside of the case mouth.
The neck turning tool only removes material around the case mouth. It's not touching the neck after that.
You can see the ring of material that's been removed.
A few twists in a Glit pad and the outside is the neck is nice and smooth.
I got the same thing when I tumbled with SS media and I could see the difference with my pressure trace system between the cases that had it removed and those that didn't. The rifle also shot better when they were removed. A fraction of an MOA better, but noticeably better.
I beleive that removing this burr is often the reason why people see accuracy improvements after neck turning. It improves neck tension consistency, but not for the reason that is often attributed to it.
You often hear people say that they don't see any improvements with neck turning in loose factory chambers, but they do in custom chambers that are supposed to be no-turn. Many no turn chambers are only 0.004" more in diameter than loaded neck diameter. All that it takes is 0.001" of burr on the inside and on the outside and you have a little ring of brass that is being pinched between the bullet and the chamber. And I highly doubt the burr is going to be consistent from case-to-case, so on some rounds it may not get pinched, on others it may just touch (but will interfere with the pressure ring on the bullet), and on others it may be getting pinched hard.
The neck turning tool only removes material around the case mouth. It's not touching the neck after that.
You can see the ring of material that's been removed.
A few twists in a Glit pad and the outside is the neck is nice and smooth.
I got the same thing when I tumbled with SS media and I could see the difference with my pressure trace system between the cases that had it removed and those that didn't. The rifle also shot better when they were removed. A fraction of an MOA better, but noticeably better.
I beleive that removing this burr is often the reason why people see accuracy improvements after neck turning. It improves neck tension consistency, but not for the reason that is often attributed to it.
You often hear people say that they don't see any improvements with neck turning in loose factory chambers, but they do in custom chambers that are supposed to be no-turn. Many no turn chambers are only 0.004" more in diameter than loaded neck diameter. All that it takes is 0.001" of burr on the inside and on the outside and you have a little ring of brass that is being pinched between the bullet and the chamber. And I highly doubt the burr is going to be consistent from case-to-case, so on some rounds it may not get pinched, on others it may just touch (but will interfere with the pressure ring on the bullet), and on others it may be getting pinched hard.
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Canadian eh!
Regular
he works for a living!!
