Friend Anthony DiOrio

[Bill Calfee]

Friend Anthony DiOrio


Friend AD:


You need not respond to this.......I'm just thinking out loud.....about triggers, and wanted you to hear it.


Simplicity.

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I had a long conversation a couple months ago with Jerry Graves.


Jerry was a double tough RFBR shooter back in the day.


Jerry is one of those individuals who looks at his RFBR rifle simply as a tool.......


And, it's his job to figure out the best way to use it.


He's not into the technical aspects of a RFBR gun, cause it's simply a tool that's required for him to compete in RFBR.



At the bench Jerry looked like a big bear, hugging over the top of his 40-X.


He held that thing hard, cause that's the way it shot the best....


A lot of shooters are afraid to touch their guns....


By the way, Harry Deneen was just like Jerry.......Harry held his rifles, hard, with both hands.



Anyway...........................



Jerry's 40-X used one of the original, Remington 2 0z three lever triggers....


So one day Jerry decided he'd upgrade to a Jewel.........


He installed it, or had it installed, and went to shooting.


He told me he had occasional odd shots......even with the same ammo, that he did not have with the simplistic Remington three lever.


He said he checked the bedding, since the metal was out of the stock to change the trigger, and it was good.


But he still had an occasional odd shot...



So he decided to put the Remington three lever back in the rifle....


And the occasional odd shots went away.




Simplicity:

Anthony, the three lever Remington pattern trigger is pure simplicity compared to the complexity of the three most popular triggers being used in RFBR today.



The design is so simple that it's practically fool proof.


Again AD, you need not respond......I'm just thinking out loud.



Your friend, Bill Calfee

 

[Bill Calfee]

Friend AD

Friend AD


Friend AD:


I'm still thinking out loud, so you need not respond...


AD, the three lever trigger you're working on for the new MD-PAS triple pistols, has two contact points that have to work perfectly 100% of the time.


The popular B&A trigger we're discussing now on CYA, has five contact points that have to work perfectly 100% of the time.



The three lever DiOrio trigger has two contact points that must work perfectly, 100% of the time, to produce uniform ignition.

The very popular B&A trigger, for example, has five contact points that must work perfectly 100% of the time, to produce uniform ignition.

Anthony, my gut tells me the world of accuracy is ready to revisit the consistency of three lever triggers.


My friend, like it or not, the ball is in your court...........


Anthony, you have the potential to own the Remington pattern trigger accuracy market with your new three lever trigger..........


Your friend, Bill Calfee

 

[DiOrioMFG]

Bill,

Been working on both the trigger and XP action parts and starting to make good progress, there never seems to be enough hours in a day. I’ll post some pictures later this week if I get a chance. I’m excited about the potential of the new trigger if all goes accordingly with the design. Hopefully it will become a viable trigger option for the rim fire bench rest community.

best Regards, Anthony

 

[Bill Calfee]

Friend AD

Bill,

Been working on both the trigger and XP action parts and starting to make good progress, there never seems to be enough hours in a day. I’ll post some pictures later this week if I get a chance. I’m excited about the potential of the new trigger if all goes accordingly with the design. Hopefully it will become a viable trigger option for the rim fire bench rest community.

best Regards, Anthony

_________________________________


Friend AD:


Anthony, the most important question about triggers for RFBR guns is this:


How does the actual function of the trigger affect accuracy?


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I've gummed up the trigger in my new MD-PAS triple pistol with solvent.


So far it still functions perfect.....

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Anthony, here's something major you have going for you with your new triggers:


By using a tension spring, and since the fulcrum point of the spring's attachment is so close to the pivot point of the third lever, compared to the tip of the third lever, where it contacts the trigger sear, the actual movement of the tension spring is almost nil..........................


In other words, the return spring, since its movement is so small, should last a million cycles.....or more...

Anthony, you're a busy man..........


So you need not respond....


But, my gut tells me the world of accuracy, rimfire and centerfire, is ready to revisit three lever triggers, because they are so fool proof with regards to 100% consistency.


Your friend, Bill Calfee

 

[Bill Calfee]

Friend AD

Friend AD



The B&A has the lightest upward pressure on the bottom of the cocking piece of the three currently most popular RFBR triggers...


Notice where the transfer bar return spring is located on the B&A:

You can see that the return spring is about half way between the pivot pin and the tip of the transfer bar....


In other words, about a 1 to 1 fulcrum ratio.


And this trigger has the lightest upward pressure, at that fulcrum ratio.


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Now look at the fulcrum ratio of your new trigger's return spring:

The ratio of the spring to the pivot pin, verses from the pivot pin to the top of the third lever where it bears against the bottom of the transfer bar, has got to be something on the order of 1 to 8 or maybe 1 to 9...


The upward pressure of the trigger in my new MD-PAS pistol is the lightest I've ever seen, as close to a manual re-set trigger lightness as possible and still be spring return.


The manual re-set has zero upward pressure, of course.


The fulcrum ratio of this trigger has got to be something on the order of 1 to 8 or 1 to 9...



AD, I've not gummed the trigger up enough to prevent it from working.....


Trying to do this is kinda waiting for water to boil.......it comes all of a sudden, and maybe my trigger will gum up to the point of malfunction, too, when I'm not wanting it to......


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Lastly:


After our conversation a couple days ago I went to the range with my new pistol.......I'd told you I was headed out...


Anyway, no one can sit down behind this thing and not be impressed.....


And if 100 shooters did such, I doubt there would be a single complaint about the trigger......


You need not respond.........I'm just thinking out loud again.


Your friend, Bill Calfee

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This is the most fun and exciting RFBR gun I've ever fooled with over these past 30 years, hands down.