Specifications for PRIMEVIL

Bill Calfee

Gun Fool
Specifications for PRIMEVIL


Seekers of rimfire accuracy advancement:


Here are the specifications for PRIMEVIL......(I just got off the phone with J-PAT)



Action.....well blueprinted DiOrio V-3

Firing pin...DiOrio Crescent

Footprint depth...... .022"

Firing pin spring.......10 day "pre stressed" Pepper.....

Firing pin travel...... .205"

Headspace...... .045"

Chamber.....Calfee .225" x 2 degree leade...

Engraving length........(since there's so much misunderstanding about engraving length, I'll just say that the chamber is "fully engraved"...

Post chamber lap......yes

Barrel.....Muller corrugated 8........taper lapped by J-PAT

Barrel length.....24 plus......900" diameter..

MD.......Standard HH/MD.......no weights or ornaments...

Trigger.....FF

Stock....McMillan FF straight lined by J-PAT

Scope......Kahles.....sorry but I forgot to ask what power or what rings are used...

Paint....by J-PAT

Receiver cosmetics.....I'm honored that I got to do them myself....thank you J-PAT and Robert Oates

I'm also honored that I got to shoot PRIMEVIL.....and my goodness it is bad......as Robert is starting to show the world.



DSC01845.jpg


Your LBK and pistol fool friend, Bill Calfee
 
Specifications for PRIMEVIL


Seekers of rimfire accuracy advancement:


Here are the specifications for PRIMEVIL......(I just got off the phone with J-PAT)



Action.....well blueprinted DiOrio V-3

Firing pin...DiOrio Crescent

Footprint depth...... .022"

Firing pin spring.......10 day "pre stressed" Pepper.....

Firing pin travel...... .205"

Headspace...... .045"

Chamber.....Calfee .225" x 2 degree leade...

Engraving length........(since there's so much misunderstanding about engraving length, I'll just say that the chamber is "fully engraved"...

Post chamber lap......yes

Barrel.....Muller corrugated 8........taper lapped by J-PAT

Barrel length.....24 plus......900" diameter..

MD.......Standard HH/MD.......no weights or ornaments...

Trigger.....FF

Stock....McMillan FF straight lined by J-PAT

Scope......Kahles.....sorry but I forgot to ask what power or what rings are used...

Paint....by J-PAT

Receiver cosmetics.....I'm honored that I got to do them myself....thank you J-PAT and Robert Oates

I'm also honored that I got to shoot PRIMEVIL.....and my goodness it is bad......as Robert is starting to show the world.



View attachment 5047


Your LBK and pistol fool friend, Bill Calfee

That is one fine looking rifle. Shoots pretty good too!

Robert has to be proud to own it. Anyone would be proud to own it.

TKH
 
Driving the Crescent

Specifications for PRIMEVIL


Seekers of rimfire accuracy advancement:


Here are the specifications for PRIMEVIL......(I just got off the phone with J-PAT)



Action.....well blueprinted DiOrio V-3

Firing pin...DiOrio Crescent

Footprint depth...... .022"

Firing pin spring.......10 day "pre stressed" Pepper.....

Firing pin travel...... .205"

Headspace...... .045"

Chamber.....Calfee .225" x 2 degree leade...

Engraving length........(since there's so much misunderstanding about engraving length, I'll just say that the chamber is "fully engraved"...

Post chamber lap......yes

Barrel.....Muller corrugated 8........taper lapped by J-PAT

Barrel length.....24 plus......900" diameter..

MD.......Standard HH/MD.......no weights or ornaments...

Trigger.....FF

Stock....McMillan FF straight lined by J-PAT

Scope......Kahles.....sorry but I forgot to ask what power or what rings are used...

Paint....by J-PAT

Receiver cosmetics.....I'm honored that I got to do them myself....thank you J-PAT and Robert Oates

I'm also honored that I got to shoot PRIMEVIL.....and my goodness it is bad......as Robert is starting to show the world.



View attachment 5047


Your LBK and pistol fool friend, Bill Calfee


_________________________________________


Driving the Crescent



Seekers of rimfire accuracy advancement:


The DiOrio Crescent firing pin is the future of rimfire accuracy advancement...



But it must be placed properly adjacent to the outside edge of the rim and it must be driven properly.


And these things are solely in the hands of DiOrio Manufacturing.



The Crescent pin is not a kitchen tabletop endeavor.....



Driving the Crescent pin requires at least .205" of pin fall.....with a 20 lb spring......

.200" of pin fall with a 21 lb spring or .195" of pin fall with a 22 lb spring....


In the case of PRIMEVIL, which uses an early V-3 with the capacity to drive the pin .220" if needed, J-PAT achieved the required .022" of footprint depth with .205" of pin fall and a 10 day "pre-compressed" Pepper spring.....


Also the Crescent pin had the perfect relationship to the outside edge of the rim......



What I'm trying to say here is this:



If DiOrio Manufacturing furnishes the Crescent pin with the tip in the correct relationship to the outside edge of the rim, and, a V-1 or V-3 action capable of producing at least .200" of pin fall, or even better .220" of pin fall.....


The Crescent pin is without question the future of rimfire accuracy advancement.

If these conditions are not met, one is better off with the traditional chisel style pin tip.


Your LBK and pistol fool friend, Bill Calfee
 
10 day "pre stressed" Pepper

Dear Mr. Calfee: If I may ask without asking you to divulge any industry secrets - I have some unused Pepper firing pin springs that I cannot get to take a set (frankly, same problem with Anthony's springs). Can you easily describe how I make a 10 day "pre stressed" Pepper firing pin spring. I have two V-3"s with which I have had very good results. Both will allow .217 firing pin travel. If you could help I would sincerely appreciate it. I have learned more more about rimfire accuracy from your site than from all others in this game. If this information is something that is uncomfortable for you to divulge I will understand completely. Thank you. Lawrence Beasley
 
Friend LB

Dear Mr. Calfee: If I may ask without asking you to divulge any industry secrets - I have some unused Pepper firing pin springs that I cannot get to take a set (frankly, same problem with Anthony's springs). Can you easily describe how I make a 10 day "pre stressed" Pepper firing pin spring. I have two V-3"s with which I have had very good results. Both will allow .217 firing pin travel. If you could help I would sincerely appreciate it. I have learned more more about rimfire accuracy from your site than from all others in this game. If this information is something that is uncomfortable for you to divulge I will understand completely. Thank you. Lawrence Beasley

____________________________


Friend LB:



Your comment in bold orange:


I'm sorry, but I don't understand what you mean by "take a set".....



Your LBK and pistol fool friend Bill Calfee


___________________________


PS:
Your comment in bold red:


Thank you......numerous folks have stated the same thing.......

CYA is dedicated to advancing rimfire accuracy, where ever that leads, and nothing else
.
 
Friend LB

I understand. Thanks anyway. Lawrence Beasley

_______________________


Friend LB:



I apologize for my ignorance, but I can't figure out what you mean by "take a set"......I'd be glad to help if I could...


Maybe this will help some:


J-PAT has developed a method of pre-stressing his springs so when he sets up his ignition it doesn't change over time...


If you set up your ignition with a fresh spring, then of course the spring will "take a set" and your ignition will suffer in time.



Let me say this, too......even the way J-PAT does his ignition, with his pre-stressed springs, over time the ignition will suffer slightly, but not near what it does when one sets up their ignition with a fresh spring...



J-PAT's method might lose a pound of spring rate over time.......but ignition set up with a fresh spring will loose several pounds of rate over time.


Exactly how J-PAT pre-stresses his springs is proprietary information, although he's informed me it takes a minimum of 10 days to accomplish it.



Your LBK and pistol fool friend, Bill Calfee
 
10 day pre-stressed springs...

10 day pre-stressed springs...


Awhile back I advised Tony TDX Harper on how J-PAT does his 10 day pre-stressed springs...



The problem was I didn't know the whole story.......



So the info I related to TDX is only partially correct...


I've got a gut idea how J-PAT does it.....besides what I told TDX, but it would be speculation on my part to mention it...


I do know this:



One can not set up ignition with a fresh spring and expect the ignition not to degrade over time......


Even J-PAT's pre-stressed ignition will degrade slightly over time, but, nothing like what happens when ignition is set up with a fresh spring.



PRIMRVIL has not lost any degree of ignition since J-PAT built it......


The footprint depth started out at .022" and I'll bet a dollar bill that it's still at least .021".......if not still at .022"....




Here's ole BC shooting PRIMEVIL


DSC01846.jpg


The above picture was taken 10/9/21....so PRIMEVIL is one year old and I can pretty much guarantee the footprint depth of the Crescent pin is still at least .021".....if not still at .022"....



Man that thing is stout.....I can't wait till the ARA Indoor, which Robert told me he's going to do all he can to be there....



Your LBK and pistol fool friend, Bill Calfee
 
This is the future of rimfire accuracy advancement

This is the future of rimfire accuracy advancement


Seekers of rimfire accuracy advancement:


This is the future of rimfire accuracy advancement:


DSC01845.jpg


But to have more of these means we must have more "quality" MD-PAS ignition actions...


So where are they going to come from?



Your concerned LBK and pistol fool friend, Bill Calfee
 
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