Weighing Primers?

[rsmithsr50]

lol waste of time and primers.
seated to the bottom(uniform bottoms) and as small (.002) crush in place.
test has been done and published.
I think dusty found it somewhere.
QUOTE="Rocketvapor, post: 37729386, member: 1313157"]I've got a seating depth test all loaded up.
Before I made the decision to try primer sorting.
Talk about timing
Somehow I think there will be some second guessing after I shoot these,
and the local range is still flooded.
Waiting is hell.[/QUOTE]

 

[dmoran]

lol waste of time and primers.
seated to the bottom(uniform bottoms) and as small (.002) crush in place.
test has been done and published.
I think dusty found it somewhere.

Since when is testing seating depth a waste of time and primers?
Just the opposite is what most I know would tell ya....

Your not reading peoples post right and replying with conjecture, is the waste of time.
In to big of a rush to smear and argue, gets the better of you again !.!.!
Reap what you sow....

 

[Rocketvapor]

Bullet seating.
Jump test. Loaded before primer sorting decision.

 

[hogpatrol]

I did an experiment with loads for my smokeless muzzleloader, I weighed bullets, sabots, powder and primers. Variations can be as big as 1.5+ grains on the bullets (SSTs), 1/2 grain on sabots and primers. Powder I do down to .02 grain. Made a difference at the furthest I shoot this rifle, 300 meters. Groups shrunk fifty percent.

 

[JFrank]

John 8:7

 

[JEFFPPC]

Couple of things to consider. Is the rifle capable of the accuracy required to tell a difference in primers. I believe it will show more as distance increases. Does the application need this level of fine tuning. I know shooting groundhogs in the head at 300 or even 400 yrs does not require sorting primers.Shooting a deer much farther then 99 percent of hunters even attempt does not require it either. If your shooting a competitive discipline which requires .5 minute or better accuracy past 300 yds now I think it is something I don't want to leave on the table. At he higher levels of competition most whom are competitive try to eliminate all the variables they can. So it is necessary for some, maybe a waste of time for many others.

 

[Joe Salt]

John 8:7

We are not throwing stones just bullets. LOL

Joe Salt

 

[JFrank]

We are not throwing stones just bullets. LOL

Joe Salt

I certainly wasn’t referring to you Joe

 

[Medic505]

I think Mike would argue with you if you told him he was right....

 

[Medic505]

So I went off the deep end yesterday and weigh sorted 300 Federal M205M's. I was surprised how close in weight they were. Ended up with 3 batches and 3 outliers. we'll see what happens.

Going
Down
The
Rabbit
Hole

 

[Rocketvapor]

What weights did you get?

 

[Medic505]

I sorted in Grams.
0.346 - 0.347
0.348 - 0.349 had the most, and I didn't count them
0.340 - 0.341
And I had 3 that were 0.345

My question to those who sort, would you go back and reweigh and divide into 6 different lots?

 

[rsmithsr50]

you do not listen to me but
I sort and shoot in .02 groups

I sorted in Grams.
0.346 - 0.347
0.348 - 0.349 had the most, and I didn't count them
0.340 - 0.341
And I had 3 that were 0.345

My question to those who sort, would you go back and reweigh and divide into 6 different lots?

 

[Downeast]

Reply from a friend of mine...

"I was told from the production line assemblers @ RAAP, Radford Army Ammo Plant Va., that primer weight consistency is what determines Match Primers from the Standard and Magnum primers. Match primers are weighed and sorted by the line worker. The most consistent primers are sorted as Match. The assemblers on the line that produce the Match grade primers receive a production pay bonus. So all want to make the tightest tolerances. Also burn characteristics "brisance". Digital display equipment would show the sear break, the firing pin contact to the primer, the detonation of the primer cup pellet, the rise time of the primer cup pellet, the burn time and the decline, the fire particles into the cartridge propellant, rise time, duration and chamber pressure curve. I worked at RAAP as a Test Measurement Diagnostic Equipment Supervisor and later as a Auditor Inspector. ISO and Army Regulations. All measurement parameters, test equipment, arms gages and ammo gages.

A neat place, but no free samples! A good bunch of folks.

Hercules, Alliant, ATK.

Don't want to weigh, just go with Match Primers, the work has been done for you.




Brisance
Brisance is the shattering capability of a high explosive, determined mainly by its detonation pressure. The term can be traced from the French verb "briser" (to break or shatter) ultimately derived from the Celtic word "brissim" (to break). Brisance is of practical importance for determining the effectiveness of an explosion in fragmenting shells, bomb casings, grenades, structures, and the like. The sand crush test and Trauzl lead block test are commonly used to determine the relative brisance in comparison to TNT (which is considered a standard reference for many purposes).

 

[T-shooter]

I sorted in Grams.
0.346 - 0.347
0.348 - 0.349 had the most, and I didn't count them
0.340 - 0.341
And I had 3 that were 0.345

My question to those who sort, would you go back and reweigh and divide into 6 different lots?

Take 5 of each group and fire them in an empty case, then reweigh them. That might indicate how much was the propellent.

 

[Rocketvapor]

T-shooter,
Most were heavy,
Only three 345 plus some 346-347
Some ? at the low end/
Doesn't sound like a normal fully populated set.
I'm not going to recommend how to group or what to shoot.
Are you comfortable with your weighing proceedure?