Blanking primers

[DHuffman]

I agree but the Federal and the 400 will even blank in actions with tight firing pins. They will not hold up to high pressure. Matt

I agree that's why I don't use them.

 

[dkhunt14]

The spelling ch

Why do you say the thicker br4 and 450 primers will blank quicker? My experience has been the opposite.

The spelling checker changed my words. It was supposed to be the other way around. I will correct it. I even said the Federal and CCI 400 Blank quicker. Matt

 

[DHuffman]

The spelling ch

The spelling checker changed my words. It was supposed to be the other way around. I will correct it. Matt

Ah yeah, happens to me frequently.

 

[dkhunt14]

Ah yeah, happens to me frequently.

That what I get for not reading before hitting post. Happens a lot. Sometimes the words they change to I never heard of or completely changes the meaning. Matt

 

[222 rem]

That what I get for not reading before hitting post. Happens a lot. Sometimes the words they change to I never heard of or completely changes the meaning. Matt

The only rifle I have experienced pierced primers with was a Ruger in 204. Load was not over pressures. Gave up on the gun and moved on.

 

[DHuffman]

The only rifle I have experienced pierced primers with was a Ruger in 204. Load was not over pressures. Gave up on the gun and moved on.

Loads don't have to be over pressure to blank a primer. Sloppy bolt head firing pin channel and or improper shape and or protrusion on the firing pin tip.

 

[mike a]

The BR4 and the 450 have thicker harder cups, they will blank not blank as quick. I can't shoot federal, CCI 400 in my BAT Dasher. They will blank. Here is a thickness chart. Matt

FEDERAL 200 .019
FEDERAL 205m .0225
CCI 400 .020
CCI 450 .025
CCI BR4 .025

Thanx Matt, you've given me good advice in the past. As I said earlier I have 1k BR4s enroute, We shall see.

 

[Capt. Oblivious]

What springs are you guys using in your RPRs to overcome this primer problem? A friend off mine is also suffering the same problem and its a bit harder to find the springs over here. Are you guys finding that say a 26 (pound) spring sorts it out or is there no magic number?

 

[mike a]

Update, so I got my BR4 primers. Success, even with hot loads no problems. Not even cratering. Thanx guys, Mike A

 

[dkhunt14]

What springs are you guys using in your RPRs to overcome this primer problem? A friend off mine is also suffering the same problem and its a bit harder to find the springs over here. Are you guys finding that say a 26 (pound) spring sorts it out or is there no magic number?

I believe it also has to do with firing pin weight and pin fall. Even BAT added weight to his pins after Dwight Scott showed him. Some gunsmiths add weight and change pinfall. Of coarse fresh springs can help some also. The springs can lose an inch of compression in a year. At least that's what I have seen on some. Matt

 

[Capt. Oblivious]

Thanks, they turned a new pin and changed the spring out to a stronger spring this morning and it seems to have done the trick

 

[fguffey]

When fired the primer conforms to the firing pin. The firing pin spring must be strong enough to hold the pressure in the primer. If the spring is weak pressure inside the primer pushes the dent out of the primer. It is about this time the dent reverses. Instead of an 'innie' the dent becomes an 'outtie'.

And then there is a big problem with hot, high pressure metal cutting gas escaping back past the bolt face. It is possible you only started with one problem; that would have been a weak firing pin spring.

It is one of those .7854" things.

F. Guffey

 

[gambleone]

The original post #17 said "they will not blank as quick" then in the quoted post #18 the wording somehow
got changed to say "they will blank as quick as some."
Computers

 

[fguffey]

not as quick; will blank as quick

And I will assume we are talking about punching hole in primers. The hole is punched from the inside out. 'quick and quicker', I have serious doubts about anyone on this form that has the ability measure quick and quicker; once the pressure falls off it is over.

F. Guffey

 

[dkhunt14]

And I will assume we are talking about punching hole in primers. The hole is punched from the inside out. 'quick and quicker', I have serious doubts about anyone on this form that can measure quick and quicker; once the pressure falls off it is over.

F. Guffey

I don't agree with this. It is usually caused by a weak spring letting the firing pin bounce. When it touches it the second time with the primer forced flat against the bolt face, the primer gets pierced. There are other causes also but this is one of them. Thin cups with high pressures or a bad firing pin to bolt fit are two others. Matt