No Turn 6PPC Chamber

lejarretnoir

lejarretnoir

JP Poulin
Anyone try this yet?
I see it listed at PT&G. Was wondering how good Norma or Lapua brass is with a no neck turn chamber.
What are the best specs for the chamber to work well?
 
lejarretnoir said:
Anyone try this yet? I see it listed at PT&G. Was wondering how good Norma or Lapua brass is with a no neck turn chamber. What are the best specs for the chamber to work well?
Click to expand...

Some would argue the Gene Bukys or Speedy-Boyer #3 or whatever the latest Mr. Boyer might be using reamer specs [PT&G], and most likely be correct 99.9999% of the time. Why screw around with PROVEN science?
 
I have a .268 neck in my guns and cannot use Norma brass because the necks are too thin unturned to work. A .267 neck or smaller would probably work. Tim
 
i had a no turn 6ppc barrel one time. the barrel shot well. I cut the tennon off and rechambered it with my 1045 reamer and the barrel shot lights out. i wont ever have another. lee
 
Tim Gardner ( of Douglas Barrels) and his wife Laura, used a no turn neck PPC for years . I believe it to be a 22 PPC. I'm pretty sure , Laura Gardner won the unlimited class, @ Rachel's Glen down in LA (Lower Alabama). Don't remember the year.
lejarretnoir said:
Anyone try this yet?
I see it listed at PT&G. Was wondering how good Norma or Lapua brass is with a no neck turn chamber.
What are the best specs for the chamber to work well?
Click to expand...
 
The no-turn neck 6PPC cartridge, are you going to be hunting subterranean squirrels with it, using it in competitive BR matches, local fun matches, or other type venture?
 
I'm thinking of experimenting with it local matches first. It's not that I can't turn necks, but if Norma necks have less than .0005 runout I'd like to see if it makes any real world difference with turned .220 Russian and fireformed Lapua vs 6PPC Norma unturned.
Just wondering if the .268 - .269 chamber necks is the best way to try both brass and compare. Was hoping someone tested this out before.
 
Here's how that's gonna go. If you get a mediocre barrel, you will shoot mediocre either way. If you get an exceptional barrel, you will shoot exceptional either way. First really good group from whichever will make your mind for the long run.

The logical chamber is one that you can make concentric necks that will last a few days regardless of available case quality. If you've got enough cases with .0005 unturned runout I think you should just go with a chamber that fits those cases. Probably won't need more than 40 to plumb wear out a barrel. Turn up a few Lapua cases to get it out of your system and be done.
 
lejarretnoir said:
I'm thinking of experimenting with it local matches first. It's not that I can't turn necks, but if Norma necks have less than .0005 runout I'd like to see if it makes any real world difference with turned .220 Russian and fireformed Lapua vs 6PPC Norma unturned.
Just wondering if the .268 - .269 chamber necks is the best way to try both brass and compare. Was hoping someone tested this out before.
Click to expand...

We've put together several to run side by side. I've worked extensively with three competition capable platforms using 12 different PPC and BR reamers from no-turn to the old standard .262

it is my opinion that as long as you stay below .271 you will not be able to tell the difference on a 100-200yd gun BUT.....

And this is a big BUTT!!!!!

I'm in total agreement with Wilbur, 99.9% of the people in the world will choose the first one that WORKS. Only complete weirdo's like me will ever go back and retry stuff, or spend more time with the doggy barrel, or re-chamber the same barrel 4 times using different reamers. (all of which incidentally "prove" nothing)
 
Interesting stuff. I remember reading that some BR shooters buy barrels in batches test them and only keep the hummers.
As Wilbur said, I also believe from my own testing in F-Class that some barrels are mediocre and some excel.
Cartridge and bullet design combined with the correct throat, lead and rifle twist will have impact on accuracy also.
I'm convinced a perfectly concentric neck will give a slight edge in accuracy and can't hurt it.
alinwa, it seems you found the limit to neck thickness and I'm going to try the thicker neck route first.
Boyd, is that the Houston Warehouse experiments you speak of?
 
I agree with Boyd, there are folks capable of finding the difference, people with indoor facilities and great skill.....

I stick by my assertion that you will not be able to tell the difference :)

al
 
Last edited:
I would say that this is one of those things that are so close that it would take a lot of really good out of doors testing to know for sure. I pay close attention to tunnel test results, because in many cases, the amount of money that it would cost to get a reliable result out of doors would be prohibitive. If you don't have a rail gun with a really good barrel that you know how to reliably put into perfect tune, and don't speak wind flag with perfect fluency? If not, you are probably not equipped to answer this one.
 
You must log in or register to reply here.
Back
Top