full length resize or neck size only ?

[AJC]

If you look at the center case below, the amount the primer is protruding is how far the extractor let the cartridge move forward. Meaning even at "headspace maximus" the extractor held the case close enough for the firing pin to set off the cartridge.

I have seen this because my dad and his friend did this in a M1. Both of the people involved have been gunners and reloaders for over 20 years each. This may be more common than i expected, and that's terrifying. Even worse is that they had a pile of 6 of these cases before they stopped. No alcohol involved.

 

[BoydAllen]

So, is Harrell’s measuring off of the shoulder set back or the .200 at the base of the cartridge?

I believe that the different variations of Harrell's dies for the same caliber are generally different base dimensions. The shoulder set back is of course determined by the user, by how he sets the die in the press.

 

[59FLH]

Well for a novice reloader setting up the sizing die as the manufacturer recommends will certainly work. Sort of like using saami dimensions or a saami case gauge. It just isn't the best method for ultimate accuracy or brass life.

Agreed, by the time I got through the thread and posted I got distracted and forgot the OP's question was for bench rest.

 

[Ccrider]

I believe that the different variations of Harrell's dies for the same caliber are generally different base dimensions. The shoulder set back is of course determined by the user, by how he sets the die in the press.

Ok. If this is true, the base diameter is not affected enough to cause a tight fit or bolt closing after three firings. So, should you fire brass until the bolt closure is tight due to the base expanding? This is a totally different situation than when the bolt is tight due to the shoulder needing to be set back-bolt click.

 

[JFrank]

Ok. If this is true, the base diameter is not affected enough to cause a tight fit or bolt closing after three firings. So, should you fire brass until the bolt closure is tight due to the base expanding? This is a totally different situation than when the bolt is tight due to the shoulder needing to be set back-bolt click.

Do you have your reamer print

 

[Ccrider]

Do you have your reamer print

No. Not on my 6ppc.

 

[BoydAllen]

Ok. If this is true, the base diameter is not affected enough to cause a tight fit or bolt closing after three firings. So, should you fire brass until the bolt closure is tight due to the base expanding? This is a totally different situation than when the bolt is tight due to the shoulder needing to be set back-bolt click.

Generally, I use a safe/hot load to fire form cases several times and call that good. For a PPC in a custom action, if the case length and neck clearance are right, you can make some pressure with 133, but I do not think that any amount of 133 that you can get into a 6PPC case, behind a bullet of 68 grains or less would be dangerous. I do these firings to send in neck sizing. On the base diameter, it is a little different from the shoulder. Strictly speaking you do not have to have a case that is fully tight in this area to determine the size of an appropriate die. On the click. I believe that it is not a shoulder tightness issue. When you raise the bolt handle to the top, there is no restraint of the case in that direction. Click is a back of the case thing.

 

[Ccrider]

Thanks for explaining Boyd.

 

[Webster]

Which method is most used by bench rest shooters ?

87 replies when one sentence is the correct answer.

 

[Toby Bradshaw]

87 replies when one sentence is the correct answer.

It's worse than that -- 87 replies to the 117th thread on this topic.