ppc ?

G

g n brezinski

Member
in the 6 mm vestion what are the nomal chamber neck size for yur guns.i see alot of different chamber neck sizes.is one better then another?
gary
 
When the PPC first came about brass was fire formed from SAKO .220 Russian brass. In order to have the desired clearance and have the necks clean up a chamber neck diameter of .262 was probably the most common. When other brass that would clean up at a greater thickness came along, shooters who already had .262 neck reamers mostly kept going with what they had because it worked very well and the only adjustment for the new brass would be to turn more off of the necks. Most of my barrels are have .262 neck chambers because before I had the rifle built I bought my own reamer so that my FL die would continue to be correct for subsequent barrels. Back then I ran less neck clearance than I do now and I cut my necks to around .0086 thick. These days, taking advice from some top shooters, I have gone closer to .003 clearance and necks that are perhaps .0081 thick...which reduced the amount of friction that my necks could exert on seated bullets. Since it has been my experience that 133 likes neck tension, I decided to try a .263 chamber and so far, I like it just fine. It does what I want it to, allowing me to cut my necks to the previously used thickness and have the clearance that I want. One thing to consider if you go larger is that the Norma brass has thinner necks and by the time that you take a clean up cut I seem to remember that for normal clearances that you don't want to go over .265. I believe that Jackie Schmidt has tried and written about his experience with thicker necks and if memory serves he found not accuracy advantage there. Of course with thicker necks you can probably get by turning them once, but given the small number of cases involved that is really no big deal (for me). If and when I buy a new reamer it will probably be a .263.
 
g n brezinski said:
in the 6 mm vestion what are the nomal chamber neck size for yur guns.i see alot of different chamber neck sizes.is one better then another?
gary
Click to expand...

You won’t go wrong anywhere from .263 to 0.270
Virgin Lapua 220 measures about 0.0148 to 0.0152
If you are running around the 0.003 clearance you will be neck turning to around 0.0118 for a 270 neck
Assumes the reamer has cut .270 of course

I have both 0.263 and .270 and I haven’t noticed a difference

All I have noticed is I can neck turn in one pass now.

So use which ever one you want too

Michael
 
Accuracywise - no difference.

Workwise - a little favor to the thicker neck.

Summary - the thicker neck would be the choice for the first barrel.
 
Actually, the original ppc's were a lot of .264 necks, but after reamers were resharpened, .262 seemed to become the standard.
 
necks

thank you for your imput.i have another ?given a 6 mm ppc and a lv rifle how long does a barrel last for competion shooting.do you get say 1500 rounds and it is time to pull the barrel or is 1000 rounds the norm.again thank you for your imput.i am just trying to get educated in this bench rest shooting sport.
gary b
 
g n brezinski said:
thank you for your imput.i have another ?given a 6 mm ppc and a lv rifle how long does a barrel last for competion shooting.do you get say 1500 rounds and it is time to pull the barrel or is 1000 rounds the norm.again thank you for your imput.i am just trying to get educated in this bench rest shooting sport.
gary b
Click to expand...

It really depends. Some lose their competitive edge within a few hundred rounds. Others go well beyond 1,000. Rare to see them stay competitive over 2,000 but it has happened. The target, and possibly your bore scope, will tell you when to pull the tube.

-Lee
www.singleactions.com
 
Y'all write such that it sounds like you believe neck thickness is of some importance to accuracy. As long as you've got a little clearance and the necks are consistent, I don't think it matters at all.
 
Lee Martin said:
It really depends. Some lose their competitive edge within a few hundred rounds. Others go well beyond 1,000. Rare to see them stay competitive over 2,000 but it has happened. The target, and possibly your bore scope, will tell you when to pull the tube.

-Lee
www.singleactions.com
Click to expand...

Depends for sure! If you can tolerate losing or simply don't have the cash, you can wait until your barrel completely gives up the ghost. If you don't like to lose, then start looking for a winning barrel right now and never stop. The latter is quite expensive. DO NOT go to the nationals with a barrel anywhere near 1000 rounds unless you've got a replacement or two...and the loads already established. Even then, you're gonna lose ground trying to figure out whether to swap barrels or not.
 
ppc

"Tony B uses a 0.263 neck. He has more HOF points than the next three shooters combined!!"

Did he get all of those points using a .263 Neck?
 
Greyfox said:
Not trying to be a smartass, but spelling, punctuation and coherent sentences go a long way toward getting answers for your questions.

Rick
Click to expand...

Think of it as reading a code. Some people are better waiting it dan others.

Later
Dave
 
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I might be wrong, but perhaps English is not Mr Brezinski's first language.

If it is not, he at least putting forth a good effort in participating .
 
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