6mm PPC small base case vs normal base, measurements plz....

[Richard]

there is no problem if the bullet is above the doughnut. Having your free bore to match the bullet takes care of all that.
Where I have seen guys having problems is when the free bore is short and the bullet is way down the neck. Like I said it's a fine line between no doughnut and having a neck pop off the case because the neck is thin at the neck shoulder junction. Having a cutter at the right angle makes no difference if you cut to far.
Just throat the bbl so the bullet is halfway down the neck and all of this is moot.
Richard

 

[brickeyee]

What's the perceived problem if you have a donut below the bullet?

You have lost the clearance to release a long bullet that goes full diameter past the neck shoulder joint.

I run barely 0.0020 of clearance on my varmint rifle (Panda action, Right bolt, left port, no ejector).

It is set up very much like a longer range BR rifle.

 

[adamsgt]

I never knew why folks turned cases into the shoulder to prevent a donut. I just turned the neck all the way to the bottom and let it go at that. I understand that the donut becomes a problem if it contacts the bullet but never had it happen if the necks were turned to the shoulder. What's the perceived problem if you have a donut below the bullet?

Well, one actual problem is you can't use a Jones decapper if you have the doughnut. That's also a way to find out if you have doughnuts in your brass.

 

[Wilbur]

Yep, I'm off base with that comment. I remember using a decapping tool and admsgt is right...and I haven't loaded anything but the PPC for a long, long time. Further, I'm not sure but I think the larger necks of todays chambers is on the money.

 

[brickeyee]

I have a couple lathe projects stacked up.
Time to buy a 1 ton foldable shop crane yo get the lathe back on its stands.

The nearest knock down engine hoist for rent is about an 45 minutes each way away.

Harbor Freight has on for around $100 with a coupon.