ASSRA Forum - 22RF Dual Firing Pins

ASSRA Forum › General › Gunsmithing Single Shot Rifles › 22RF Dual Firing Pins

(Moderator Group: Moderator)

‹ Previous Topic | Next Topic ›

Page Index Toggle

Pages: [1] 2

Hot Topic (More than 10 Replies)

22RF Dual Firing Pins (Read 8080 times)

frnkeore Frequent Elocutionist Offline Posts: 7342 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	22RF Dual Firing Pins Sep 24^th, 2015 at 2:34pm	Print Post
	I'm building a 44/45 for match shooting and I'm wanting to make the firing pin to indent the rim at 3 & 9 o,clock. The reason for this is 3 fold, number one, I don't like firing pins that strike against the extractor and the second reason is that I can do this, using the CF firing pin hole (the rifle was originally a 32/40). And three, I'll be BSing this rifle and I'm looking for better ignition from domestic RF cases. It will take the shape of a 3/16 x .300 hole, across the center of the rim area with a protrusion on each side for the firing pins. I don't know if anyone has done this on a SS but, it seems to me that I've seen/heard of a bolt rifle that uses a daul FP. Does anyone know anything about dual FP's on a 22rf? Frank

	ASSRA Member #696, ISSA Member #339
	YIM AIM IP Logged

Lyle Participating Member Offline Posts: 42 Location: Washington Joined: Apr 12^th, 2015	Re: 22RF Dual Firing Pins Reply #1 - Sep 24^th, 2015 at 4:04pm	Print Post
	The original Springfield 1922 Gallery Practice rifle used a double striker. Subsequent models (M1 and M2) used a single striker.

	Limit politicians to two terms: office followed by prison.
	IP Logged

tim_s Oldtimer Offline Posts: 818 Location: 13066 Joined: Oct 11^th, 2006	Re: 22RF Dual Firing Pins Reply #2 - Sep 24^th, 2015 at 6:25pm	Print Post
	Dual pins offered in custom astions are all 6 & 12. Those that have extensively tested them seem to feel no benefit. Current trends at the highest levels of rimfire accuracy are for a single pin at 6 o'clock.

	“ I don’t have to be faster than the bear, I just have to be faster than you”
	IP Logged

uscra112 Frequent Elocutionist Offline Posts: 4079 Location: Switzerland of Ohio Joined: May 7^th, 2007	Re: 22RF Dual Firing Pins Reply #3 - Sep 24^th, 2015 at 6:40pm	Print Post
	Do I get the idea that you are not going to have any breechblock metal between the two pins? One of my .22 Ballards has the reversible firing pin, and the case bulges quite dramatically where the only support is the face of the firing pin. All that thrust is taken by the firing pin retainer cross-pin in a Stevens.

	<div class=
	IP Logged

BP Frequent Elocutionist Offline Posts: 8039 Location: Westside Joined: Aug 27^th, 2006	Re: 22RF Dual Firing Pins Reply #4 - Sep 24^th, 2015 at 8:45pm	Print Post
	Frank, Sounds like your looking to make a scaled-down 22RF size "Snapper", which is what Winchester called the part with dual tits at 3 and 9 o'clock that struck the rim of the 44 Henry rimfire cartridge for the Henry and the Model 1866. The snapper was drilled and tapped through its center, and threaded onto the front of the "Breech-Pin Piston" that we now-a-days call a firing pin. Not much new under the sun. PS: Don't go letting anyone know you're thinking about using an idea from a lever-action in your singleshot.
	« Last Edit: Sep 24^th, 2015 at 8:55pm by BP »
	There are three kinds of men: The ones that learn by reading, the few who learn by observation, and the rest who have to pee on the electric fence and find out for themselves. Proud Noodlehead
	IP Logged

frnkeore Frequent Elocutionist Offline Posts: 7342 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: 22RF Dual Firing Pins Reply #5 - Sep 24^th, 2015 at 9:50pm	Print Post
	Phil, Thank you for bring that up, I hadn't thought about it. It could become a issue and I might wind up doing a plate, Possibly a cross dovetail, kinda like you would do on a Ballard. Because of that, I'll make the FP only 1/8 x .300 and see what happens. The dual pins will be chisel shaped, protrude .030 and sit just below the BB face. Hopefully, the hammer will mitigate the case swelling. BP, If you don't tell on me, I'll be very greatful It could be a double wammy because of those those illegal late 44 bolts. Bolts and lever stuff would be the end to my project Frank
	« Last Edit: Sep 24^th, 2015 at 10:55pm by frnkeore »
	ASSRA Member #696, ISSA Member #339
	YIM AIM IP Logged

uscra112 Frequent Elocutionist Offline Posts: 4079 Location: Switzerland of Ohio Joined: May 7^th, 2007	Re: 22RF Dual Firing Pins Reply #6 - Sep 24^th, 2015 at 10:41pm	Print Post
	That makes sense, Frank. Anything to reduce the area that the gas pressure can act upon. BTW I've never had a rupture, perhaps because I limit that gun to subsonic loads. But it still bothers me.

	<div class=
	IP Logged

Singleshotlover Ex Member	Re: 22RF Dual Firing Pins Reply #7 - Sep 25^th, 2015 at 12:34am	Print Post
	The Italian vetlery had two firing pins and so did (I Think) did the henry rifle when it was using rimfire cartridges.Frank


	IP Logged

John Taylor Frequent Elocutionist Offline Posts: 1718 Location: Lewiston, ID Joined: Oct 23^rd, 2006	Re: 22RF Dual Firing Pins Reply #8 - Sep 25^th, 2015 at 9:36am	Print Post
	The 1873 in 22 rim fire had two little raised areas on the bolt face. The hammer drove the whole bolt forward to fire the cartridge. Not one of Winchester's better ideas. I have converted a few to have a single floating firing pin.

	John Taylor Machinist/gunsmith
	WWW IP Logged

sportslube Oldtimer Offline Posts: 549 Location: Eau Claire, wi Joined: May 13^th, 2008	Re: 22RF Dual Firing Pins Reply #9 - Sep 25^th, 2015 at 1:51pm	Print Post
	My American made Henry rifle in 44 RF has the dual firing pins at 9 and 3 Just like they did back in the old days bill


	IP Logged

BP Frequent Elocutionist Offline Posts: 8039 Location: Westside Joined: Aug 27^th, 2006	Re: 22RF Dual Firing Pins Reply #10 - Sep 25^th, 2015 at 2:59pm	Print Post
	frnkeore wrote on Sep 24^th, 2015 at 9:50pm: Phil, Thank you for bring that up, I hadn't thought about it. It could become a issue and I might wind up doing a plate, Possibly a cross dovetail, kinda like you would do on a Ballard. Because of that, I'll make the FP only 1/8 x .300 and see what happens. The dual pins will be chisel shaped, protrude .030 and sit just below the BB face. Hopefully, the hammer will mitigate the case swelling. BP, If you don't tell on me, I'll be very greatful It could be a double wammy because of those those illegal late 44 bolts. Bolts and lever stuff would be the end to my project Frank Frank, A washer in the block face like the Mann-Niedner to support the case rim, but slotted with a slitting saw at 3 and 9 o'clock for extended chisel tips of the snapper to move through, and you'd have one of the rare Mann-Niedner rimfire conversions.

	There are three kinds of men: The ones that learn by reading, the few who learn by observation, and the rest who have to pee on the electric fence and find out for themselves. Proud Noodlehead
	IP Logged

frnkeore Frequent Elocutionist Offline Posts: 7342 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: 22RF Dual Firing Pins Reply #11 - Sep 25^th, 2015 at 4:13pm	Print Post
	thank you, everyone for your input. It's appreciated, very much. A couple more ideas about this project: 1. The rear thrust will be taken out on the BB itself. The cross bar will bottom out in the BB and the only purpose of the cross pin will be to keep the FP from coming out the front. 2. I will capture the case rim by making the c'bore for the rim .040. I came up with that idea about a year ago, hoping to make ignition more contestant. Since the BB comes forward, on a arc, it should work well and be safe. I can also try making the chisel full width to help limit the amount that the case head expands, between the FP's. It will make interesting indents that way. I'm sure there will be some head scratching when they are picked up after a match. Are there any 22rf forums that have discussed the dual pins, that I can check out? Frank

	ASSRA Member #696, ISSA Member #339
	YIM AIM IP Logged

wesg Senior Forum Member Offline Posts: 301 Joined: Sep 13^th, 2004	Re: 22RF Dual Firing Pins Reply #12 - Sep 26^th, 2015 at 1:28am	Print Post
	AFAIK, all the European smallbore rifles that win all the medals in Olympic and World Championship competition have a single firing pin. And contrary to the rimfire benchrest world, they're all at 12:00. AFAIK anyway. 2 pins will require twice the force to properly indent a cartridge. Considering the above, I can't think of any reason to even bother trying it. May have been a 'good' idea in the 1800's, when rimfire cartridges weren't anywhere near as well made as they are now.


	IP Logged

singleshotom Senior Forum Member Offline Posts: 371 Location: tofield AB. Canada Joined: Feb 23^rd, 2008	Re: 22RF Dual Firing Pins Reply #13 - Sep 26^th, 2015 at 1:09pm	Print Post
	Frank, the ol one eyed guy an I tried a double pin on a couple of BSA Martinis and found no improvement in either one did a bit of testing and the groups from chosen ammo showed absolutely no noticeable change. ( a couple of yrs ago) But you should try it to see if you fine a change. tom


	IP Logged

frnkeore Frequent Elocutionist Offline Posts: 7342 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: 22RF Dual Firing Pins Reply #14 - Sep 27^th, 2015 at 12:56am	Print Post
	Tom, Did you and Ron try any of the standard velocity CCI and Federal ammo? That's what I'm hoping to improve on, I want to use those cases for BSing. I have some Wolf Match to pull the bullets and try but, I'm way to cheap to buy the high end ammo. I'm pretty committed to this now as, I won't use the FP against the extractor and I don't want to raise it to 12 o'clock. Hopefully it won't hurt accuracy but, I guess I have a lot to do, to find out. Frank

	ASSRA Member #696, ISSA Member #339
	YIM AIM IP Logged

Page Index Toggle

Pages: [1] 2

‹ Previous Topic | Next Topic ›

« Board Index ‹ Board Top

Top

ASSRA Forum » Powered by YaBB 2.6.12!
YaBB Forum Software © 2000-2025. All Rights Reserved.

Valid XHTML

Valid CSS

Powered by Perl

Source Forge

Page completed in 1.1575 seconds.