Questions about pt&g aluminium firing pin assembly for rem 700

[Rem6br]

What are the pros and cons if any of an aluminium firing pin assembly?

 

[Dusty Stevens]

Less inertia therefore lighter less consistent primer strikes

 

[jonbearman]

The tubb light weight pin comes with a special spring to make up for mass that is lost.

 

[Steve Blair]

Less inertia therefore lighter less consistent primer strikes

[br]
Kinetic energy is ½MV2 [br]
If you drive the firing pin sufficiently faster, the striking energy is increased. Velocity is the driver, not mass. A faster firing pin also slightly decreases the time from sear release to primer strike, usually called "lock time".

 

[Raythemanroe]

I think in BR it has no benefits




Ray

 

[dkhunt14]

In testing done by !000 yard Benchrest guys; when they tried the lightweight Tubbs springs the groups got bigger. Even the short range guys sent there action to Dwight Scott and he added a carbide weight to the pin for better ignition. Even BAT has changed his fire control since Dwight Scott showed him it was not the best. Maybe Joe Salt will chime in with his test results. Matt

 

[Joe Salt]

dkhunter14 saved my butt when I changed to the Tubb firing pin and spring. My groups got big, went back to the 28# spring with stock firing pin and group went back to small.

Joe Salt

 

[eww1350]

Sooo,...does that mean that David Tubb does not use his own product...to shoot all those records..??



Eddie in Texas

 

[dkhunt14]

Shooting offhand is a different game. You want fast lock time. Maybe he doesn't use it. In 1000 yard BR if the conditions are good and you have 4 inches of vertical you probably lost before you shoot. In some of the other games groups don't count; only score or hits on steel. If you think that firing pins and springs make no difference in accuracy, you are wrong. In my BAT's I change the firing pin springs every 2 years. They lose about 1/2 inch of compression in a year or two. I have seen guns that would not group at 1000 yards and no matter what you tried you couldn't get rid of vertical. Put in a new firing pin spring and the gun comes alive. Call any of the top BR or longrange gunsmiths or action makers and they will tell you. Most of them know it. Matt

 

[Raythemanroe]

Tubbs duo spring set, claim it has a pound or two more with less felt bolt lift.. This setup is different from the aluminum pin spring setup, supposedly it lightens bolt lift and removes bolt wiggle after release..


Ray

 

[Joe Salt]

All Matt I are trying to tell you, Don't throw your old set up away. You may want to go back and compare groups with each. Eddie Tubb's is in business to make money, maybe he uses his products but I'm sure he is given the best actions out there to test. Kind of like Matt breaking the record everyone sent him all kinds of stuff! Eddie you and I got to shoot better.

Joe Salt

 

[Raythemanroe]

The Duo doesn't use a speedlock pin I don't believe. I think it is just a dual spring system like on many sub compact pistols to lighten cocking force required..


https://www.youtube.com/watch?v=ZZA_tRk4Wjk


Ray

 

[Raythemanroe]

I'm just talking dual springs. I'm not in favor of aluminum pins for BR.. Dual springs work in sub compact pistols while lightening up cocking forces needed.. Speedy and a couple others believe dual springs have as much spring with less cocking effort..



Ray

 

[LHSmith]

The name Gonzolez ( Speedy) has been absent from the gunsmith column of BR match results for some time. I do see the names Scott, Borden, and Kelbly ( G. Walley) listed ......usually listed in the winners column.

 

[BoydAllen]

The dual springs do not reduce the peak cocked weight. I have them. I think that there may be some issues relating to pin tip diameter when using a light pin. I have a Viper (.062 nominal pin tip) and have tried various combinations. The light pin jars the rifle less, and I have not seen any accuracy problems. I believe this is because the smaller tip concentrates the force in a smaller area, requiring less energy to get the job done. My pin fall is .220 with the trigger bracket reversed, .200 originally. When a single spring is compressed, it rotates against the pin shoulder and front of the shroud. The friction is added to the cocking effort. The dual springs are wound right and left so that their rotations cancel out.

 

[Rem6br]

I was thinking of using one for weight reduction on my hunting rifle but I think now I should just leave well enough alone. I don't want any accuracy issues. Thanks guys for all the replies

 

[expiper]

welll.....since this is the internet and people can type anything the want ,,,here is my .02 $$...I have fooled with lots of springs on dirt track and drag cars and worked on spring hangers that hold 30-50 tons each and the spring is large enuff for a small man to crawl thru,,,,a coil spring is a torsion bar that is wrapped into a coil,,,when you compress a coil spring you are twisting the entire length of the spring ,,not rotating the coil,,,with "dual" springs the reason the inner and outer springs are coiled in opposite directions is to avoid the coils from falling into one another and becoming "coil bound".....when a spring weakens it looses its ability to return to its original relaxed ammount of twist ,which is what we see as a short mainspring in a modern bolt action rifle,,,,I have been shooting competitively (NBRSA-IBS)for over 50 yrs and know the importance of a "fresh" spring in a rifle,,,I shoot Kelbly actions and have had two spring issues over the yrs which were my fault for not realizing that they do wear out,,,,dont fall for every gimmick that is 'claimed' to improve pin fall and lock time,,,,Roger

 

[BoydAllen]

Roger,
The Tubb springs are installed end to end, not one inside the other. They are the same diameter. Both ends of both springs are properly finished, not "pigtailed".
Boyd

 

[BoydAllen]

Zfastmalibou,
I have used several different primers, but mostly 205s. The only primer that I avoid is the 7 1/2, because, for the PPC, a hot primer does not seem to be appropriate. All of the primers that I have used seemed to work fairly well. I have shot large and small groups with them all, depending on tune and operator.
Boyd

 

[dkhunt14]

Boyd I would think that the short range would not show up as much as at 600 or 1000. Even though I know a lot of the top short range guys have used the weighted pin by Dwight Scott or Dave Bruno. When my benchrest student showed up this year with a Bix and Andy trigger and a weighted pin and he told me to cock and pull the trigger. I knew as soon as I touched the trigger there was a difference. I believe the vertical is critical and shows up a lot more at distance. Matt