Shoulder bump

['Freak]

dua ...?

 

[dkhunt14]

The reloader must know the length of the chamber, it sounds like Redding has hired a reloader to write their instructions. Before the Redding competition shell holder reloaders with shop skills could size the case to increase and or decrease case clearance or the length of the case from the shoulder to the case head. If a reloader chooses to avoid sizing the case they can do it the old fashion way; they can use a feeler gage to adjust the die off the shell holder.

When using a feeler gage things can get complicated. When adjusting the die in a cam over press reloaders should understand it is different than when the reloader is adjusting the die in a non cam over press. I could say that is the reason the instructions call the cam over press a bump press, I believe I am the only reloader that understand that.

F.Guffey

Apparently, alot of other companies hired that same reloader to write and name their products. Matt

 

[LHSmith]

it all starts with a simple question and then goes to who knows everything about everything.ME,I don't know chicken squat,but I do have a basic knowledge of what I do load.
now I have a hot date with Stormy,,take that Guffster

She don't do that anymore, she found a more lucrative way to screw people.

 

[dolek]

There is not one shooter on this forum that can answer your question, there is not one shooter on this forum or any other forum that can bump the shoulder back. All of them are repeating what they read on the internet, I can only guess they have no investigative skill or curiosity. Back when I started there was no one telling me 'this is how it is done'.

I can shorten a case from the shoulder to the case head, I can not shorten the case from the shoulder to the case head by moving the shoulder back. And then; again, it is impossible to bump/move the shoulder back with a die that has case body support.

If you are having trouble sizing cases I suggest you lower the die to increase the presses ability to overcome the cases ability to resist sizing. There are stories about shooters that have friends that have friends that have shot cases 45+ times; not a one of the shooters can tell me how much the case weighed when they started and when they finished. And, the stories are embellished with claims the friend of a friend did all of that with max. loads.

F. Guffey

 

[Dusty Stevens]

Like barry obama said- you didnt build that somebody else did.

 

[Mikemci]

"You can't bump a shoulder" just ask fguffy.
"Bumble bees can't fly" just ask a physicist.

 

[fguffey]

"You can't bump a shoulder" just ask fguffy.
"Bumble bees can't fly" just ask a physicist

Bumpers and bumble bees: Reloaders believe they can move the shoulder back, I said it is impossible to move the shoulder back. I said the reloader can shorten the distance from the shoulder to the case head but the shoulder they started with is not the same shoulder they are left with when finished. I suggested the reloader scribe the case body/shoulder juncture first.

Back to bumpers, they claim they do all of this with a cam over press; and I ask how is that possible because the cam over press requires the die to be adjusted differently when using a cam over press and a non cam over press. I checked a RCBS A2 press for cam over, it had .017" cam over. I accused the owner of the press of chucking the A2 in a mill for reasons he did not know. Anyhow, he could not lower the ram meaning he had that press locked 'up'.

F. Guffey

 

[Eddie Harren]

"Mr. Guffey, when I first started shooting IBS, 30 years ago, I competed in the Hunter class. I chose a -.200" 308 Win. case that was called a "30 Doggie". I began making cases with Remington URBR 308 brass. I had a die set, made by CH4D, that consisted of a die to move the shoulder back .200" and a trim die to cut off .200" from the mouth of the case. How was this possible according to your statement above?

It makes no difference how much the shoulder was moved whether it was .002" or .200" the shoulder was bumped or, moved back." Was it not?

Mr. Guffey, I'm going to ask you once again to answer my question.

 

[pirate ammo]

"Mr. Guffey, when I first started shooting IBS, 30 years ago, I competed in the Hunter class. I chose a -.200" 308 Win. case that was called a "30 Doggie". I began making cases with Remington URBR 308 brass. I had a die set, made by CH4D, that consisted of a die to move the shoulder back .200" and a trim die to cut off .200" from the mouth of the case. How was this possible according to your statement above?

It makes no difference how much the shoulder was moved whether it was .002" or .200" the shoulder was bumped or, moved back." Was it not?

Mr. Guffey, I'm going to ask you once again to answer my question.

your asking Guffy a question,are you really sure you want to do this,you might want to rethink this,for it will bring down the wrath of Guffydom

 

[Richard Coody]

"Mr. Guffey, when I first started shooting IBS, 30 years ago, I competed in the Hunter class. I chose a -.200" 308 Win. case that was called a "30 Doggie". I began making cases with Remington URBR 308 brass. I had a die set, made by CH4D, that consisted of a die to move the shoulder back .200" and a trim die to cut off .200" from the mouth of the case. How was this possible according to your statement above?

It makes no difference how much the shoulder was moved whether it was .002" or .200" the shoulder was bumped or, moved back." Was it not?

Mr. Guffey, I'm going to ask you once again to answer my question.

it is all a question of semantics
in your case case body formed much of the new shoulder and some of the old shoulder became neck. that is what he means. when we "bump" the shoulder .001 case body, shoulder and neck kind of swap places. when we fire the round they swap back. over time that shoulder brass slowly migrates into the neck. why we have to trim.